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Observation of a Chirality-Induced Exchange-Bias Effect / K. Chen [et al.] // Phys. Rev. Appl. - 2019. - Vol. 12, Is. 2. - Ст. 024047, DOI 10.1103/PhysRevApplied.12.024047. - Cited References: 68. - K.C. benefited from the support of the Deusche Forschungsgemeinschaft (DFG) via Project No. 615811. A.P.-K. gratefully acknowledges support from the DFG via Sonderforschungsbereich (collaborative research center) SFB925 (subproject B3). . - ISSN 2331-7019

РУБ Physics, Applied
Рубрики:
SPIN-ORBIT TORQUE
   FIELD
   ANISOTROPY
   MAGNETISM
Аннотация: Chiral magnetism that manifests in the existence of skyrmions or chiral domain walls offers an alternative way for creating anisotropies in magnetic materials that might have large potential for application in future spintronic devices. Here we show experimental evidence for an alternative type of in-plane exchange-bias effect present at room temperature that is created from a chiral 90∘ domain wall at the interface of a ferrimagnetic-ferromagnetic Dy-Co/Ni-Fe bilayer system. The chiral interfacial domain wall forms due to the exchange coupling of Ni-Fe and Dy-Co at the interface and the presence of Dzyaloshinskii-Moriya interaction in the Dy-Co layer. As a consequence of the preferred chirality of the interfacial domain wall, the sign of the exchange-bias effect can be reversed by changing the perpendicular orientation of the Dy-Co magnetization. The chirality-created tunable exchange bias in Dy-Co/Ni-Fe is very robust against high in-plane magnetic fields (μ0H≤6T) and does not show any aging effects. Therefore, it overcomes the limitations of conventional exchange-bias systems.

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Держатели документа:
Helmholtz Zentrum Berlin Mat & Energie, Albert Einstein Str 15, D-12489 Berlin, Germany.
Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany.
Oak Ridge Natl Lab, Neutron Scattering Div, Neutron Sci Directorate, Oak Ridge, TN 37831 USA.
Uppsala Univ, Dept Phys & Astron, Box 516, SE-75120 Uppsala, Sweden.
European Synchrotron Radiat Facil, Swiss Norwegian Beamlines, F-38043 Grenoble, France.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
RAS, SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Helmholtz Zentrum Geesthacht, Inst Mat Res, Max Planck Str 1, D-21502 Geesthacht, Germany.

Доп.точки доступа:
Chen, K.; Philippi-Kobs, A.; Lauter, V.; Vorobiev, A.; Dyadkina, E.; Yakovchuk, V. Yu.; Stolyar, S. V.; Столяр, Сергей Викторович; Lott, D.; Deusche Forschungsgemeinschaft (DFG)German Research Foundation (DFG) [615811]; DFG via Sonderforschungsbereich (collaborative research center)German Research Foundation (DFG) [SFB925]
}
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Effect of the Semiconductor Spacer on Positive Exchange Bias in the CoNi/Si/FeNi Three-Layer Structure / G. S. Patrin [et al.] // JETP Letters. - 2019. - Vol. 109, Is. 5. - P. 320-324, DOI 10.1134/S0021364019050126. - Cited References: 26. - This work was supported by the Russian Foundation for Basic Research (project no. 18-02-00161-a). . - ISSN 0021-3640. - ISSN 1090-6487
Рубрики:
MEDIA
Аннотация: Films consisting of a hard magnetic ferromagnet CoNi and a soft magnetic ferromagnet FeNi interacting through a nonmagnetic Si semiconductor spacer are experimentally studied. The temperature and field dependences of the magnetic properties of film structures with different silicon thicknesses are examined. It is found that the multilayer structure has the properties inherent in magnetic springs and exhibits positive exchange bias as a function of the silicon thickness.

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Публикация на русском языке Влияние полупроводниковой прослойки на эффект положительного обменного смещения в трехслойной структуре CoNi/Si/FeNi [Текст] / Г. С. Патрин [и др.] // Письма в ЖЭТФ. - 2019. - Т. 109 Вып. 5-6. - С. 325-330

Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Fed Res Ctr KSC, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Patrin, G. S.; Патрин, Геннадий Семёнович; Turpanov, I. A.; Yushkov, V. I.; Юшков, Василий Иванович; Kobyakov, A. V.; Кобяков, Александр Васильевич; Patrin, K. G.; Yurkin, G. Yu.; Zhivaya, Ya A.; Russian Foundation for Basic Research [18-02-00161-a]
}
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Magnetic and Resonant Properties of Fe-Bi Films / G. S. Patrin [et al.] // Phys. Solid State. - 2019. - Vol. 61, Is. 9. - P. 1670-1674, DOI 10.1134/S1063783419090233. - Cited References: 14. - These studies were supported by the Russian Foundation for Basic Research (project no. 18-02-00161-a). . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
EXCHANGE BIAS
Кл.слова (ненормированные):
bismuth interlayer -- exchange bias -- granulated subsystem -- magnetic anisotropy
Аннотация: Film structures in the Fe-Bi system have been studied experimentally. The magnetic state of the two-layer structures is shown by electron magnetic resonance to be dependent on the order of depositing magnetic and nonmagnetic layers. The three-layer structures demonstrate the effect of the exchange bias, the value of which is dependent on the bismuth interlayer thickness.

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Публикация на русском языке Магнитные и резонансные свойства пленок в системе Fe-Bi [Текст] / Г. С. Патрин [и др.] // Физ. тверд. тела. - 2019. - Т. 61 Вып. 9. - С. 1717-1721

Держатели документа:
Siberian Fed Univ, Krasnoyarsk, Russia.
Russian Acad Sci, Siberian Branch, Fed Res Ctr, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Patrin, G. S.; Патрин, Геннадий Семёнович; Yakovchuk, V. Yu.; Яковчук, Виктор Юрьевич; Yarikov, S. A.; Яриков, Станислав Алексеевич; Shiyan, Ya. G.; Шиян, Ярослав Германович; Furdyk, V. P.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-02-00161-a]
}
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Features of relaxation of the remanent magnetization of antiferromagnetic nanoparticles by the example of ferrihydrite / D. A. Balaev, A. A. Krasikov, A. D. Balaev [et al.] // Phys. Solid State. - 2020. - Vol. 62, Is. 7. - P. 1172-1178, DOI 10.1134/S1063783420070033. - Cited References: 53 . - ISSN 1063-7834
Кл.слова (ненормированные):
antiferromagnetic nanoparticles -- ferrihydrite -- exchange bias -- magnetization relaxation
Аннотация: The relaxation of the remanent magnetization of antiferromagnetically ordered ferrihydrite nanoparticles at the exchange bias effect implemented in these systems has been investigated. The magnetization relaxation depends logarithmically on time, which is typical of the thermally activated hoppings of particle magnetic moments through the potential barriers caused by the magnetic anisotropy. The barrier energy obtained by processing of the remanent magnetization relaxation data under the field cooling conditions significantly exceeds the barrier energy under standard (zero field cooling) conditions. The observed difference points out the possibility of using the remanent magnetization relaxation to analyze the mechanisms responsible for the exchange bias effect in antiferromagnetic nanoparticles and measure the parameters of the exchange coupling of magnetic subsystems in such objects.

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Публикация на русском языке Особенности релаксации остаточной намагниченности антиферромагнитных наночастиц на примере ферригидрита [Текст] / Д. А. Балаев, А. А. Красиков, А. Д. Балаев [и др.] // Физ. тверд. тела. - 2020. - Т. 62 Вып. 7. - С. 1043-1049

Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Krasikov, A. A.; Красиков, Александр Александрович; Balaev, A. D.; Балаев, Александр Дмитриевич; Stolyar, S. V.; Столяр, Сергей Викторович; Ladygina, V. P.; Iskhakov, R. S.; Исхаков, Рауф Садыкович
}
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    The role of the semiconductor layer in the exchange-bias film structure of CoNi / Si / FeNi / Si with a spin spring effect / A. V. Kobyakov [et al.] // J. Phys. Conf. Ser. - 2019. - Vol. 1389, Is. 1. - Ст. 012028, DOI 10.1088/1742-6596/1389/1/012028. - Cited References: 13. - These studies are conducted with financial support from the Russian Foundation for Basic Research (grant No.18-02-00161-a). . - ISSN 1742-6588. - ISSN 1742-6596
   Перевод заглавия: Роль полупроводникового слоя в структуре пленок обменного смещения CoNi / Si / FeNi / Si с эффектом спиновой пружины
Аннотация: CoNi / Si / FeNi / Si structures were synthesized by ion-plasma sputtering. A negative hysteresis loop bias was detected at the thickness of the silicon layer was less than 2 nm and the temperature was less than 100 K. A positive hysteresis loop bias was detected at the thickness of the silicon layer was more than 2 nm and the temperature greater than 100K.

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Держатели документа:
Siberian Federal University, prospect Svobodny, 79, Krasnoyarsk, 660041, Russia
L.V. Kirensky Institute of Physics of Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, 660036, Russia

Доп.точки доступа:
Kobyakov, A. V.; Кобяков, Александр Васильевич; Turpanov, I. A.; Турпанов, Игорь Александрович; Patrin, G. S.; Патрин, Геннадий Семёнович; Yushkov, V. I.; Юшков, Василий Иванович; Yarikov, S. A.; Яриков, Станислав Алексеевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Zhivaya, Ya. A.; Euro-Asian Symposium "Trends in MAGnetism"(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg)
}
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Temperature-dependent magnetization reversal in exchange bias NiFe/IrMn/NiFe structures / C. Gritsenko [et al.] // J. Magn. Magn. Mater. - 2019. - Vol. 482. - P. 370-375, DOI 10.1016/j.jmmm.2019.03.044. - Cited References: 55. - Ch. G. and M. G. acknowledge financial support by the Russian Foundation for Basic Research (RFBR grant. 17-32-50170). Ch. G. acknowledges the 5 top 100 Russian Academic Excellence Project at the Immanuel Kant Baltic Federal University. O.A.T. acknowledges support by the Grants-in-Aid for Scientific Research (Grant Nos. 17 K05511 and 17H05173) from MEXT, Japan, by the grant of the Center for Science and Innovation in Spintronics (Core Research Cluster), Tohoku University, by JSPS and RFBR under the Japan-Russian Research Cooperative Program. V.R. acknowledges the Ministry of Education and Science of the Russian Federation in the framework of government assignment 3.9002.2017/6.7. Electron microscopy examination was carried out at the Center for Collective Use of the Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences. We also thank Montserrat Rivas for helpful discussions. . - ISSN 0304-8853. - ISSN 1873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
COERCIVITY
   FILM
   ROUGHNESS
   THICKNESS
   HEADS
   IRMN
Кл.слова (ненормированные):
Magnetization reversal -- Exchange bias -- Permalloy
Аннотация: We demonstrate magnetization reversal features in NiFe/IrMn/NiFe thin-film structures with 40% and 75% relative content of Ni in Permalloy in the temperature range from 80 K to 300 K. The magnetization reversal sequence of the two ferromagnetic layers is found to depend on the type of NiFe alloy. In the samples with 75% relative content of Ni, the bottom ferromagnetic layer reverses prior to the top one. On the contrary, in the samples with 40% of Ni, the top ferromagnetic layer reverses prior to the bottom one. These tendencies of magnetization reversal are preserved in the entire range of temperatures. These distinctions can be explained by the morphological and structural differences of interfaces in the samples based on two types of Permalloy.

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Держатели документа:
Immanuel Kant Baltic Fed Univ, A Nevskogo 14, Kaliningrad 236041, Russia.
Lomonosov Moscow State Univ, Skobeltsyn Inst Nucl Phys, Leninskie Gory 1, Moscow 119991, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Akad Gorodok 50-38, Krasnoyarsk 660036, Russia.
Natl Univ Sci & Technol MISiS, Leninsky Prospect 4, Moscow 119049, Russia.
Lomonosov Moscow State Univ, Fac Phys, Leninskie Gory 1-2, Moscow 119991, Russia.
Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia.
Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan.
Tohoku Univ, Ctr Sci & Innovat Spintron, Sendai, Miyagi 9808577, Japan.

Доп.точки доступа:
Gritsenko, C.h.; Dzhun, I.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Gorshenkov, M.; Babaytsev, G.; Chechenin, N.; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Tretiakov, Oleg A.; Rodionova, V.; Russian Foundation for Basic Research (RFBR) [17-32-50170]; MEXT, Japan [17 K05511, 17H05173]; Center for Science and Innovation in Spintronics (Core Research Cluster), Tohoku University; JSPS; RFBR under the Japan-Russian Research Cooperative Program; Ministry of Education and Science of the Russian Federation [3.9002.2017/6.7]
}
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Gorban, A.
Codon usage trajectories and 7-cluster structure of 143 complete bacterial genornic sequences / A. . Gorban, T. . Popova, A. . Zinovyev // Physica A. - 2005. - Vol. 353. - P. 365-387, DOI 10.1016/j.physa.2005.01.043. - Cited References: 46 . - ISSN 0378-4371

РУБ Physics, Multidisciplinary
Рубрики:
DNA-BASE COMPOSITION
   ASYMMETRIC SUBSTITUTION PATTERNS
   PROTEIN-CODING REGIONS
   MICROBIAL GENOMES
   GENE IDENTIFICATION
   MARKOV-MODELS
   G+C CONTENT
   BIAS
   PREDICTION
   SELECTION
Кл.слова (ненормированные):
genome -- cluster -- codon usage -- correlations -- entropy -- mean field -- Cluster -- Codon usage -- Correlations -- Entropy -- Genome -- Mean field -- Approximation theory -- Correlation methods -- Database systems -- Entropy -- Functions -- Genes -- Mathematical models -- Clusters -- Codon usage -- Genomes -- Mean field -- Bacteria
Аннотация: Three results are presented. First, we prove the existence of a universal 7-cluster structure in all 143 completely sequenced bacterial genomes available in Genbank in August 2004, and explained its properties. The 7-cluster structure is responsible for the main part of sequence heterogeneity in bacterial genomes. In this sense, our 7 clusters is the basic model of bacterial genome sequence. We demonstrated that there are four basic "pure" types of this model, observed in nature: "parallel triangles", "perpendicular triangles", degenerated case and the flower-like type. Second, we answered the question: how big are the position-specific information and the contribution connected with correlations between nucleotide. The accuracy of the mean-field (context-free) approximation is estimated for bacterial genomes. We show that codon us-age of bacterial genomes is a multi-linear function of their genomic G+C-content with high accuracy (more precisely, by two similar functions, one for eubacterial genomes and the other one for archaea). Description of these two codon-usage trajectories is the third result. All 143 cluster animated 3D-scatters are collected in a database and is made available on our web-site: http://www.ihes.fr/similar to zinovyev/7clusters. (c) 2005 Elsevier B.V. All rights reserved.

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Держатели документа:
Univ Leicester, Dept Math, Leicester LE1 7RH, Leics, England
RAS, SB, Inst Computat Modelling, Krasnoyarsk, Russia
Bures Sur Yvette & Bioinformat Serv Inst Curie, Inst Hautes Etudes Sci, Paris, France
ИВМ СО РАН
Department of Mathematics, University of Leicester, Leicester, University Road, Leicester LE1 7RH, United Kingdom
Institute of Computational Modelling, SB RAS, Krasnoyarsk, Russian Federation
Institut des Hautes Etudes Scientifiques, Bures-sur-Yvette and Bioinformatics Service of Institut Curie, Paris, France

Доп.точки доступа:
Popova, T.; Zinovyev, A.
}
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The magnetic-field-driven effect of microwave detection in a manganite granular system / N. V. Volkov [et al.] // J. Phys. D. - 2008. - Vol. 41, Is. 1. - Ст. 15004, DOI 10.1088/0022-3727/41/1/015004. - Cited References: 24 . - ISSN 0022-3727

РУБ Physics, Applied
Рубрики:
IDENTICAL METALS
   TUNNEL-JUNCTIONS
   MAGNETORESISTANCE
   RECTIFICATION
   SPINTRONICS
   TEMPERATURE
   PEROVSKITES
Кл.слова (ненормированные):
Bias currents -- Curie temperature -- Electric power generation -- Granular materials -- Magnetic field effects -- Microwave irradiation -- Voltage measurement -- Direct current voltage -- Magnetic tunnel junctions -- Metal insulator metal junctions -- Nonmagnetic metals -- Manganites
Аннотация: We demonstrate the microwave detection effect in a granular La0.7Ca0.3MnO3 sample. Dc voltage generated by the sample in response to microwave irradiation below the Curie temperature is found to be dependent on the applied magnetic field. The magnetic field dependence of the dc voltage has a broad peak resembling an absorption line. The detection effect depends substantially on the magnetic history of the sample; however, identical measurement conditions provide reproducibility of the experimental results. The detected dc voltage increases linearly with microwave power and strongly depends on a bias current through the sample. According to the results of systematic measurements, there exist two contributions to a value of the detected output signal. The first is magneto-independent; it can be explained in the framework of a mechanism used traditionally for description of the rectification effect in metal-insulator-metal junctions with nonmagnetic metals. The other is magneto-dependent; it originates from the interplay between the spin-dependent current through magnetic tunnel junctions and spin dynamics of the grains, which form these junctions in the sample.

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Держатели документа:
[Volkov, N. V.
Eremin, E. V.
Shaykhutdinov, K. A.
Tsikalov, V. S.
Petrov, M. I.
Balaev, D. A.
Semenov, S. V.] Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
[Volkov, N. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Volkov, N. V.; Волков, Никита Валентинович; Eremin, E. V.; Еремин, Евгений Владимирович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Tsikalov, V. S.; Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Semenov, S. V.; Семенов, Сергей Васильевич
}
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Exchange bias in nano-ferrihydrite / D. A. Balaev [et al.] // J. Appl. Phys. - 2016. - Vol. 120, Is. 18. - Ст. 183903, DOI 10.1063/1.4967912. - Cited References: 43. - The authors are grateful to M. Volochaev for measurements and O. A. Bayukov for Mössbauer study. - This work was supported in part by the Ministry of Education and Science of the Russian Federation. . - ISSN 0021-8979
Кл.слова (ненормированные):
Anisotropy -- Cooling systems -- Hysteresis -- Magnetic fields -- Magnetic materials -- Magnetism -- Nanomagnetics -- Nanoparticles -- Particle size -- Characteristic value -- Exchange bias -- Exchange bias effects -- External magnetic field -- Field cooling -- High anisotropy -- Minor hysteresis loop -- Superparamagnetic blocking -- Hysteresis loops
Аннотация: We report the results of investigations of the effect of cooling in an external magnetic field starting from the temperature over superparamagnetic blocking temperature TB on the shift of magnetic hysteresis loops in systems of ferrihydrite nanoparticles from ∼2.5 to ∼5 nm in size with different TB values. In virtue of high anisotropy fields of ferrihydrite nanoparticles and open hysteresis loops in the range of experimentally attainable magnetic fields, the shape of hysteresis loops of such objects in the field-cooling mode is influenced by the minor hysteresis loop effect. A technique is proposed for distinguishing the exchange bias effect among the effects related to the minor hysteresis loops caused by high anisotropy fields of ferrihydrite particles. The exchange bias in ferrihydrite is stably observed for particles not less than 3 nm in size or with TB over 40 K, and its characteristic value increases with the particle size. © 2016 Author(s).

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Держатели документа:
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Presidium of Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Krasikov, A. A.; Красиков, Александр Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Popkov, S. I.; Попков, Сергей Иванович; Stolyar, S. V.; Столяр, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Ladygina, V. P.; Yaroslavtsev, R. N.
}
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10.

Magnetic properties of NiO nano particles: Contributions of the antiferromagnetic and ferromagnetic subsystems in different magnetic field ranges up to 250 kOe / D. A. Balaev [et al.] // Phys. Solid State. - 2017. - Vol. 59, Is. 8. - P. 1547-1552, DOI 10.1134/S1063783417080029. - Cited References:40. - This study was supported by the Russian Foundation for Basic Research, Government of the Krasnoyarsk Territory, and Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activity, project no. 17-42-240138. . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
EXCHANGE-BIAS
   FERRIHYDRITE NANOPARTICLES
   HYSTERESIS ANOMALIES
   OXIDE
Аннотация: The magnetic properties of antiferromagnetic NiO nanoparticles prepared by thermal decomposition of nickel hydroxocarbonate are investigated. According to the data of magnetization measurements in fields of up to 250 kOe, the magnetic moment linearly grows in strong fields, which is caused by the contribution of the antiferromagnetically ordered nanoparticle core, and the antiferromagnetic susceptibility corresponds to that of bulk polycrystalline NiO. This allowed the antiferromagnetic and ferromagnetic contributions to the total magnetic response of a sample to be quantitatively determined. The latter occurs due to the incomplete spin compensation in an antiferromagnetic nanoparticle caused by defects on its surface. It is demonstrated that to correctly determine the superparamagnetic blocking temperature, it is necessary to take into account the antiferromagnetic susceptibility of the particle core.

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Публикация на русском языке Магнитные свойства наночастиц NiO: вклады антиферромагнитной и ферромагнитной подсистем в различных диапазонах магнитных полей до 250 kOe [Текст] / Д. А. Балаев [и др.] // Физ. тверд. тела : Наука, 2017. - Т. 59 Вып. 8. - С. 1524-1529

Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Boreskov Inst Catalysis, Siberian Branch, Novosibirsk 630090, Russia.

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Krasikov, A. A.; Красиков, Александр Александрович; Popkov, S. I.; Попков, Сергей Иванович; Balaev, A. D.; Балаев, Александр Дмитриевич; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Kirillov, V. L.; Mart'yanov, O. N.; Russian Foundation for Basic Research; Government of the Krasnoyarsk Territory; Krasnoyarsk Territorial Foundation [17-42-240138]
}
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11.

    Exchange bias in graphitic C/Co composites / H. -S. Hsu [et al.] // Carbon. - 2017. - Vol. 114. - P. 642-648, DOI 10.1016/j.carbon.2016.12.060. - Cited References: 54. - The authors would like to thank the Ministry of Science and Technology of the Republic of China, Taiwan, for financially supporting this research under Contract No. MOST 104-2112-M-153 -002 -MY3 (Hua-Shu Hsu), MOST 103-2112-M-213-004-MY3 (Hong-Ji Lin), and MOST 104-2112-M-390-001 (Shih-Jye Sun). We are thankful also to the President of Russia Program of support the leading scientific schools, grant NSh-7559,2016.2 (SGO). . - ISSN 0008-6223
   Перевод заглавия: Обменное смещение в графитовом композитном материале C/Co
Кл.слова (ненормированные):
Carbides -- Carbon -- Dichroism -- High resolution transmission electron microscopy -- Magnetoelectronics -- Transmission electron microscopy -- X ray absorption -- Electronics production -- Exchange bias effects -- Experimental evidence -- Magnetic interactions -- Potential materials -- Spintronics application -- Theoretical modeling -- X-ray magnetic circular dichroism -- Magnetic materials
Аннотация: The exchange bias (EB) effect, which is the shift of the hysteresis loop of a ferromagnet in direct contact with an antiferromagnet, is highly advantageous for the development of spintronics applications. Carbon (C) has been considered as a potential material in next generation electronics production as well as spintronics devices beyond silicon. Here we show experimental evidence for an EB in C/Co composites. The significant EB needs thermal annealing to occur. X-ray absorption spectra and transmission electron microscopy data of these samples reveal that Co carbides in as grown samples decompose and form graphitic C/Co interfaces after annealing. Using x-ray magnetic circular dichroism we have detected the C spins that are responsible for the EB. These results inspire a theoretical model to investigate the magnetic interactions in graphitic C/Co interfaces and interpret the observed results. © 2016 Elsevier Ltd

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Держатели документа:
Department of Applied Physics, National Pingtung University, 4-18, Minsheng Road, Pingtung, Taiwan
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu, Taiwan
Department of Applied Physics, National University of Kaohsiung, 700, Kaohsiung University Road, Kaohsiung, Taiwan
Kirensky Institute of Physics SB RAS, Akademgorodok 50, Bld. 38, Krasnoyarsk, Russian Federation
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, Russian Federation

Доп.точки доступа:
Hsu, Hua-Shu; Chang, Y.-Y.; Chin, Y.-Y.; Lin, H.-J.; Chen, C.-T.; Sun, S.-J.; Zharkov, S. M.; Жарков, Сергей Михайлович; Lin, C.-R.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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12.

Spin accumulation in the Fe3Si/n-Si epitaxial structure and related electric bias effect / A. S. Tarasov, A. V. Luk'yanenko, I. A. Bondarev [et al.] // Tech. Phys. Lett. - 2020. - Vol. 46, Is. 7. - P. 665-668, DOI 10.1134/S1063785020070135. - Cited References: 17. - This study was supported by the Russian Foundation for Basic Research, the Government of Krasnoyarsk krai, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities (project no. 18-42-243022), and a Grant of the Government of the Russian Federation for Creation of World Level Laboratories (agreement no. 075-15-2019-1886) . - ISSN 1063-7850. - ISSN 1090-6533

РУБ Physics, Applied
Рубрики:
TRANSPORT
Кл.слова (ненормированные):
iron silicide -- ferromagnet/semiconductor structures -- Hanle effect -- spin accumulation -- electric spin injection
Аннотация: The electrical injection of the spin-polarized current into silicon in the Fe3Si/n-Si epitaxial structure is demonstrated. The spin accumulation effect is examined by measuring the local and nonlocal voltage in a special four-terminal device. The observed effect of the electric bias on the spin signal is discussed and compared with the results obtained for ferromagnet/semiconductor structures.

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Публикация на русском языке Эффект спиновой аккумуляции в эпитаксиальной структуре Fe3Si/n-Si и влияние на него электрического смещения [Текст] / А. С. Тарасов, А. В. Лукьяненко, И. А. Бондарев [и др.] // Письма в Журн. техн. физ. - 2020. - Т. 46 № 13. - С. 43-46

Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Tarasov, A. S.; Тарасов, Антон Сергеевич; Luk'yanenko, A. V.; Лукьяненко, Анна Витальевна; Bondarev, I. A.; Бондарев, Илья Александрович; Yakovlev, I. A.; Яковлев, Иван Александрович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Volkov, N. V.; Волков, Никита Валентинович; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of Krasnoyarsk krai; Krasnoyarsk Territorial Foundation [18-42-243022]; Grant of the Government of the Russian Federation for Creation of World Level Laboratories [075-15-2019-1886]
}
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13.

Complex study of magnetization reversal mechanisms of FeNi/FeMn bilayers depending on growth conditions / C. Gritsenko, V. Lepalovskij, M. Volochaev [et al.] // Nanomaterials. - 2022. - Vol. 12, Is. 7. - Ст. 1178, DOI 10.3390/nano12071178. - Cited References: 44. - This work has been supported by the grant of the Slovak Research and Development Agency under the contract No APVV-20-0324. This work was in part financially supported by the Ministry of Science and Higher Education of the Russian Federation, Subject of the state task No. FEUZ-2020-0051 . - ISSN 2079-4991
Кл.слова (ненормированные):
exchange bias -- exchange spring -- AFM grain size -- substrate temperature -- hysteresis loop asymmetry -- magnetization reversal
Аннотация: Magnetization reversal processes in the NiFe/FeMn exchange biased structures with various antiferromagnetic layer thicknesses (0–50 nm) and glass substrate temperatures (17–600 °C) during deposition were investigated in detail. Magnetic measurements were performed in the temperature range from 80 K up to 300 K. Hysteresis loop asymmetry was found at temperatures lower than 150 K for the samples with an antiferromagnetic layer thickness of more than 10 nm. The average grain size of FeMn was found to increase with the AFM layer increase, and to decrease with the substrate temperature increase. Hysteresis loop asymmetry was explained in terms of the exchange spring model in the antiferromagnetic layer.

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Держатели документа:
Research and Education Center “Smart Materials and Biomedical Applications”, Immanuel Kant Baltic Federal University, Gaidara str., 6, Kaliningrad, 236041, Russian Federation
Solid State Magnetism Department, Institute of Natural Sciences and Mathematics, Ural Federal University, Yekaterinburg, 620002, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation
Institute of Physics, Faculty of Science, Pavol Jozef Safarik University, Park Angelinum 9, Kosice, 040 01, Slovakia
Faculty of Physics and Center for Nanointegration (CENIDE), University of Duisburg-Essen, Duisburg, 47057, Germany
Faculty of Applied Physics and Mathematics, Gdansk University of Technology, Narutowicza 11/12, Gdansk, 80233, Poland
Materials Science and Metallurgy Shared Use Research and Development Center, National University of Science and Technology MISiS, Moscow, 119049, Russian Federation

Доп.точки доступа:
Gritsenko, C.; Lepalovskij, V.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Komanicky, V.; Gorkovenko, A.; Pazniak, H.; Gazda, M.; Andreev, N.; Rodionova, V.
}
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14.

Magnetic Tunnel Structures: Transport Properties Controlled by Bias, Magnetic Field, Micro- wave and Optical Radiation [Text] / N. V. Volkov, E. V. Eremin, A. S. Tarasov [et al.] // Moscow Int. Symp. on Magnet. (MISM-2011) : Book of abstracts. - 2011. - Ст. 25RP-H-8. - P. 911-912. - Библиогр.: 2. - This study was supported by the RFBR, project no. 11-02-00367-a; Presidium of the Russian Academy of Sciences, program 21.1; the Division for Physical Sciences of the Russian Academy of Sciences, program 2.4.4.1; the Siberian Branch of the Russian Academy of Sciences, projects nos. 5 and 134; and the Federal target program, State contract NK-556P_15

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Доп.точки доступа:
Volkov, N.V.; Eremin, E.V.; Tarasov, A.S.; Varnakov, S.N.; Ovchinnikov, S.G.; Patrin, G.S.; Moscow International Symposium on Magnetism(5 ; 2011 ; Aug. ; 21-25 ; Moscow)
}
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15.

    Эффекты обменного смещения и магнитной близости в трехслойных пленках FeNi/V2O3/FeNi / Г. С. Патрин, А. В. Кобяков, В. И. Юшков [и др.] // Магнитные материалы. Новые технологии : тез. докл. IX Байкал. междунар. конф. BICMM-2023 / чл. прогр. ком.: S. S. Aplesnin [et al.] ; чл. орг. ком. R. S. Iskhakov [et al.]. - Иркутск, 2023. - С. 71-72, DOI 10.26516/978-5-9624-2178-0.2023.1-207 . - ISBN 978-5-962402178-0
   Перевод заглавия: Effects of exchange bias and magnetic proximity in trilayer FeNi/V2O3/FeNi films

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Держатели документа:
Институт физики им. Л. В. Киренского СО РАН
Сибирский федеральный университет

Доп.точки доступа:
Аплеснин, Сергей Степанович \чл. прогр. ком.\; Aplesnin, S. S.; Балаев, Дмитрий Александрович \чл. прогр. ком.\; Balaev, D. A.; Овчинников, Сергей Геннадьевич \чл. прогр. ком.\; Ovchinnikov, S. G.; Исхаков, Рауф Садыкович \чл. орг. ком.\; Iskhakov, R. S.; Патрин, Геннадий Семёнович; Patrin, G. S.; Кобяков, Александр Васильевич; Kobyakov, A. V.; Юшков, Василий Иванович; Yushkov, V. I.; Анисимов, И. О.; Жарков, Сергей Михайлович; Zharkov, S. M.; Семенов, Сергей Васильевич; Semenov, S. V.; Моисеенко, Евгений Тимофеевич; Байкальская международная конференция "Магнитные материалы. Новые технологии"(9 ; 2023 ; сент. ; 11-14 ; Байкальск); "Магнитные материалы. Новые технологии", Байкальская международная конференция(9 ; 2023 ; сент. ; 11-14 ; Байкальск); "Magnetic materials. New tecnologies", Baikal International Conference(9 ; 2023 ; Sept. ; 11-14 ; Baikalsk); Иркутский государственный университет
}
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16.

Influence of the DyxCo1-x–Bi interface on the magnetic properties of DyxCo1-x/Bi/Py three-layer structures / N. N. Kosyrev, G. S. Patrin, Ya. G. Shiyan [et al.] // J. Supercond. Nov. Magn. - 2024. - Vol. 37, Is. 2. - P. 419-424, DOI 10.1007/s10948-024-06690-0. - Cited References: 15. - The authors are grateful to R.Yu. Rudenko for carrying out measurements using an atomic force microscope. - The research was conducted according to the state assignment of the Ministry of Science and Higher Education of the Russian Federation and the Federal State Autonomous Educational Institution of Higher Education Siberian Federal University (No. FSRZ-2023–0008) . - ISSN 1557-1939. - ISSN 1557-1947
Кл.слова (ненормированные):
Multilayer magnetic films -- Exchange interaction -- Exchange bias -- Ellipsometry -- SQUID magnetometry
Аннотация: The interlayer interactions in multilayer systems with a non-magnetic semimetallic interlayer are great of interest. The magnetic and structural properties of the DyxCo1-x/Bi/Py systems (17 ˂ x ˂ 26 at.%) have been studied. The temperature dependences of magnetization in the range 4.2–300 K were measured for the first time. The influence of the bismuth interlayer thickness on the exchange interaction between the DyCo and Py layers was found as well as the critical value of its thickness. The obtained atypical value of the period of exchange bias oscillations was explained by the formation of bismuth compounds with dysprosium–pnictogenides at bismuth thicknesses below the critical value. The interface was investigated by spectral ellipsometry in the range 2–5 eV. The information on the structure of the surface obtained by atomic force microscopy was used to create a multilayer model for fitting experimental ellipsometric data. Analysis of the optical properties showed that pnictogenide Dy3Bi2 is formed at the interface, which affects the general magnetic state of the samples studied.

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Держатели документа:
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, 79 Svobodny Pr., 660041, Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC Siberian Branch Russian Academy of Sciences, Akademgorodok 50, Building 38, 660036, Krasnoyarsk, Russia
Achinsk Branch of Krasnoyarsk State Agrarian University, Achinsk, Russia

Доп.точки доступа:
Kosyrev, N. N.; Косырев, Николай Николаевич; Patrin, G. S.; Патрин, Геннадий Семёнович; Shiyan, Ya. G.; Шиян, Ярослав Германович; Volchenko, E. N.; Волченко Е. Н.; Yakovchuk, V. Yu.; Яковчук, Виктор Юрьевич; Komarov, V. A.; Комаров, Василий Андреевич; Semenov, S. V.; Семёнов, Сергей Васильевич
}
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17.

Magnetism and specific heat of ludwigites Mn1.17Co1.83BO5 and Mn1.39Co1.61BO5 / D. V. Popov, T. P. Gavrilova, M. A. Cherosov [et al.] // J. Alloys Compd. - 2024. - Vol. 976. - Ст. 173143, DOI 10.1016/j.jallcom.2023.173143. - Cited References: 34. - This research was supported by the Russian Science Foundation (Project No. 23-72-00047). The work of T.P. Gavrilova and D.V. Popov on the specific heat approximation had the financial support from the government assignment for FRC Kazan Scientific Center of RAS. The work of M.A. Cherosov on the measurements of specific heat has been supported by the Kazan Federal University Strategic Academic Leadership Program (PRIORITY-2030) . - ISSN 0925-8388. - ISSN 1873-4669
Кл.слова (ненормированные):
Magnetically ordered materials -- Ludwigites -- Exchange bias -- Spin glass transition
Аннотация: Mn1.17Co1.83BO5 and Mn1.39Co1.61BO5 ludwigites were synthesized by the flux technique and investigated by means of X-ray diffraction, X-ray fluorescence, DC and AC magnetic susceptibility, and specific heat analysis. The crystal structure of both ludwigites belongs to the Pbam space group with a = 9.25 Å, b = 12.41 Å, and c = 3.05 Å for Mn1.17Co1.83BO5 and a = 9.27 Å, b = 12.45 Å, and c = 3.05 Å for Mn1.39Co1.61BO5. The simultaneously observed negative values of the Curie-Weiss temperatures and ferromagnetic-type hysteresis loops allow us to assume that the ferrimagnetic ordering is realized in Mn1.39Co1.61BO5 below TF = 60.8 K, while in Mn1.17Co1.83BO5 in addition to the above mentioned experimental facts the frequency dependencies of the real and imaginary parts of the AC magnetization were observed assuming the presence of the canonical spin-glass state below TSG = 44.5 K. The observed difference in coercive forces of M-H curves at low temperatures can be associated with presence of two spin subsystems for Mn1.17Co1.83BO5.

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Держатели документа:
Zavoisky Physical-Technical Institute, FRC KazSC RAS, Sibirsky tract, 10/7, Kazan, 420029, Russian Federation
Institute of Physics, Kazan (Volga Region) Federal University, Kremlevskaya st., 18, Kazan, 420008, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50/38, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Popov, D. V.; Gavrilova, T. P.; Cherosov, M. A.; Shustov, V. A.; Moshkina, E. M.; Мошкина, Евгения Михайловна; Fazlizhanov, I. I.; Eremina, R. M.
}
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18.

Bias-current and optically driven transport properties of the hybrid Fe/Si02/p-Si structures [Text] / N. V. Volkov, E. V., Eremin, A. S. Tarasov [et al.] // Moscow Int. Symp. on Magnet. (MISM-2011) : Book of abstracts. - 2011. - Ст. 22PO-I-10. - P. 109. - Библиогр.: 1. - This study was supported by the Russian Foundation for Basic research, project no. 11-02-00367-a; Presidium of the Russian Academy of Sciences, program 21.1; the Division for Physical Sciences of the Russian Academy of Sciences, program 2.4.4.1; the Siberian Branch of the Russian Academy of Sciences, projects nos. 5 and 134; and the Federal target program, State contract NK-556P_15.

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Доп.точки доступа:
Volkov, N.V.; Eremin, E.V.,; Tarasov, A.S.; Varnakov, S.N.; Ovchinnikov, S.G.; Moscow International Symposium on Magnetism(5 ; 2011 ; Aug. ; 21-25 ; Moscow)
}
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19.

Magnetization reversal and sign reversal exchange bias field in polycrystalline Ni5.33Ta0.67B2O10 / S. N. Sofronova, N. V. Kazak, E. V. Eremin [et al.] // J. Alloys Compd. - 2021. - Vol. 864. - Ст. 158200, DOI 10.1016/j.jallcom.2020.158200. - Cited References: 31. - The research was funded by RFBR , Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science , project number 18-42-240007 . - ISSN 0925-8388
Кл.слова (ненормированные):
Exchange bias -- Quasi low-dimensional compounds -- Frustrated magnetism -- Magnetisation reversal
Аннотация: The sign reversal of both magnetization and exchange bias field was studied in the polycrystalline Ni5.33Ta0.67B2O10. The crystal structure of Ni5.33Ta0.67B2O10 is quasi–low dimensional due to NiO6/TaO6 octahedra forming two dimensional infinite layers. The antiferromagnetic/ferrimagnetic phase transition was observed at TN = 165 K. The negative exchange bias effect was found in the 30–90 K temperature range, whereas the positive exchange bias effect was observed at temperatures below 30 K. We assume that the exchange bias effect is due to different types of magnetic ordering of Ni2+ magnetic moments in two layers.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian State University of Science and Technologies, Krasnoyarsk, 660014, Russian Federation

Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Kazak, N. V.; Казак, Наталья Валерьевна; Eremin, E. V.; Еремин, Евгений Владимирович; Moshkina, E. M.; Мошкина, Евгения Михайловна; Chernyshov, A. V.; Чернышов, Артем Валерьевич; Bovina, A. F.; Бовина, Ася Федоровна
}
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20.

General regularities and differences in the behavior of the dynamic magnetization switching of ferrimagnetic (CoFe2O4) and antiferromagnetic (NiO) nanoparticles / S. I. Popkov, A. A. Krasikov, S. V. Semenov [et al.] // Phys. Solid State. - 2020. - Vol. 62, Is. 9. - P. 1518-1524, DOI 10.1134/S1063783420090255. - Cited References: 46. - This work was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk region, and the Krasnoyarsk Regional Foundation for Science, project no. 18-42-240012: "Magnetization switching of magnetic nanoparticles in strong pulsed magnetic fields is a new approach to studying the dynamic effects related to the processes of magnetization of magnetic nanoparticles" . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
PARTICLE-SIZE
   EXCHANGE-BIAS
   TEMPERATURE
   STATE
   COERCIVITY
Кл.слова (ненормированные):
CoFe2O4nanoparticles -- antiferromagnetic NiO nanoparticles -- dynamic magnetization switching -- coercive force
Аннотация: In antiferromagnetic (AFM) nanoparticles, an additional ferromagnetic phase forms and leads to the appearance in AFM nanoparticles of a noncompensated magnetic moment and the magnetic properties typical of common FM nanoparticles. In this work, to reveal the regularities and differences of the dynamic magnetization switching in FM and AFM nanoparticles, the typical representatives of such materials are studied: CoFe2O4 and NiO nanoparticles with average sizes 6 and 8 nm, respectively. The high fields of the irreversible behavior of the magnetizations of these samples determine the necessity of using strong pulsed fields (amplitude to 130 kOe) to eliminate the effect of the partial hysteresis loop when studying the dynamic magnetic hysteresis. For both types of the samples, coercive force HC at the dynamic magnetization switching is markedly higher than HC at quasi-static conditions. HC increases as the pulse duration τP decreases and the maximum applied field H0 increases. The dependence of HC on field variation rate dH/dt = H0/2τP is a unambiguous function for CoFe2O4 nanoparticles, and it is precisely such a behavior is expected from a system of single-domain FM nanoparticles. At the same time, for AFM NiO nanoparticles, the coercive force is no longer an unambiguous function of dH/dt, and the value of applied field H0 influences more substantially. Such a difference in the behaviors of FM and AFM nanoparticles is caused by the interaction of the FM subsystem and the AFM “core” inside AFM nanoparticles. This circumstance should be taken into account when developing the theory of dynamic hysteresis of the AFM nanoparticles and also to take into account their practical application.

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Публикация на русском языке Общие закономерности и различия в поведении динамического перемагничивания ферримагнитных (CoFe2O4) и антиферромагнитных (NiO) наночастиц [Текст] / С. И. Попков, А. А. Красиков, С. В. Семенов [и др.] // Физ. тверд. тела. - 2020. - Т. 62 Вып. 9. - С. 1354-1360

Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Boreskov Inst Catalisis, Siberian Branch, Novosibirsk 630090, Russia.

Доп.точки доступа:
Popkov, S. I.; Попков, Сергей Иванович; Krasikov, A. A.; Красиков, Александр Александрович; Semenov, S. V.; Семёнов, Сергей Васильевич; Dubrovskii, A. A.; Дубровский, Андрей Александрович; Yakushkin, S. S.; Kirillov, V. L.; Mart'yanov, O. N.; Balaev, D. A.; Балаев, Дмитрий Александрович; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk region; Krasnoyarsk Regional Foundation for Science [18-42-240012]
}
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