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1.
Theory of spin
filtering through quantum dots / J. . Fransson [et al.]> // Phys. Rev. B. - 2003. -
Vol. 67
,
Is. 20
. - Ст. 205310,
DOI
10.1103/PhysRevB.67.205310. - Cited References: 28 . - ISSN 1098-0121
РУБ
Physics, Condensed Matter
Рубрики:
DEPENDENT TUNNELING JUNCTIONS
NARROW ENERGY BANDS
ELECTRON CORRELATIONS
MAGNETORESISTANCE
BARRIER
POLARIZATION
Аннотация:
Using a nonequilibrium diagram technique for Hubbard operator Green functions combined with a generalization of the transfer Hamiltonian formalism, we calculate the transport through a magnetic quantum dot system with spin-dependent couplings to the contacts. In specific regimes of the parameter space the spin-dependent tunnel current becomes more than 99.95% spin polarized, suggesting that a device thus constructed can be used in spin-filter applications. First-principles electronic structure calculations show the existence of nanostructured systems, such as, e.g., MgO/Fe/Pd(5)/Fe/MgO (001), with the desired properties in the direction of the current.
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Держатели документа:
Uppsala Univ, Dept Phys, S-75121 Uppsala, Sweden
RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Доп.точки доступа:
Fransson, J.; Holmstrom, E.; Eriksson, O.; Sandalov, I.
}
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2.
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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3.
Structure and the
magnetic and magneto-optical properties of Co-Sm-O nanogranular films / I. S. Edelman [et al.]> // Phys. Solid State. - 2008. -
Vol. 50
,
Is. 11
. - P. 2109-2114,
DOI
10.1134/S1063783408110176. - Cited References: 15. - We would like to thank G. V. Bondarenko for the performance of the x-ray fluorescence measurements of the samples under investigation.This study was supported by the Russian Foundation for Basic Research (project no. 07-02-92174) and performed within the framework of the Program "Development of the Scientific Potential of the Higher School" (project no. 2.1.1.7376). R.D. Ivantsov acknowledges the support of the Russian Science Support Foundation. . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
FARADAY-ROTATION
GRANULAR FILMS
MAGNETORESISTANCE
CO/SIO2
Кл.слова (ненормированные):
75
--
50
--
Tt
--
75
--
70
--
-i
--
78
--
20
--
Ls
Аннотация:
The magnetic properties and magneto-optical effects in nanocomposites based on Co-Sm-O films prepared through pulsed plasma sputtering of a SmCo(5) target are investigated. It is shown that, depending on the technological conditions and regimes of subsequent annealing, the films can have different structures from cobalt nanoparticles distributed in the dielectric samarium oxide matrix with a magnetic phase volume of more than 60% to a continuous polycrystalline cobalt film with embedded samarium oxide nanoparticles. The evolution of the spectra of the magneto-optical Kerr effect and the field dependences of the magnetization is studied as a function of the film structure.
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Держатели документа:
[Edelman, I. S.
Zhigalov, V. S.
Ivantsov, R. D.
Seredkin, V. A.
Zharkov, S. M.
Prokof'ev, D. E.
Frolov, G. I.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Seredkin, V. A.
Zharkov, S. M.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Bondarenko, G. N.] Russian Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
ИХХТ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk, 660041, Russian Federation
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, ul. K. Marksa 42, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Zhigalov, V. S.; Жигалов, Виктор Степанович; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Seredkin, V. A.; Середкин, Виталий Александрович; Zharkov, S. M.; Жарков, Сергей Михайлович; Prokof'ev, D. E.; Frolov, G. I.; Фролов, Георгий Иванович; Bondarenko, G. N.; Бондаренко, Галина Николаевна
}
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4.
Structural and Magnetic
Properties of the Al2O3/Ge-p/Al2O3/Co System / A. V. Kobyakov [et al.]> // Tech. Phys. - 2019. -
Vol. 64
,
Is. 2
. - P. 236-241,
DOI
10.1134/S1063784219020087. - Cited References: 18. - This study was supported by the Russian Foundation for Basic Research, project no. 18-02-00161-a. . - ISSN 1063-7842. - ISSN 1090-6525
РУБ
Physics, Applied
Рубрики:
LAYER-DEPOSITED AL2O3
MAGNETORESISTANCE
GAAS
Аннотация:
The Al2O3/Ge-p/Al2O3/Co system with an Al2O3 buffer layer deposited by ion-plasma sputtering has been experimentally investigated. The dependences of the magnetic properties of cobalt on the rate of its deposition by ion-plasma sputtering and rate of deposition of preceding layers have been established. It is shown that the technique used to obtain buffer layers can significantly reduce the surface roughness of the next layers. The obtained buffer layers can be used as artificial substrates for growing heterostructures with tunnel junctions.
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Публикация на русском языке
Структурные и магнитные свойства систем Al2O3/Ge-p/Al2O3/Co [Текст] / А. В. Кобяков [и др.] // Журн. техн. физ. - 2019. - Т. 89 Вып. 2. - С. 268-273
Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Kirensky Inst Phys, Fed Res Ctr, Krasnoyarsk Sci Ctr,Siberian Branch, Krasnoyarsk 660036, Russia.
Krasnoyarsk State Agrarian Univ, Achinsk Branch, Krasnoyarsk 662150, Krasnoyarsk Kra, Russia.
Доп.точки доступа:
Kobyakov, A. V.; Кобяков, Александр Васильевич; Turpanov, I. A.; Турпанов, Игорь Александрович; Patrin, G. S.; Патрин, Геннадий Семёнович; Rudenko, R. Yu.; Руденко, Роман Юрьевич; Yushkov, V. I.; Юшков, Василий Иванович; Kosyrev, N. N.; Косырев, Николай Николаевич; Russian Foundation for Basic Research [18-02-00161-a]
}
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5.
Stress and growth
of Ag monolayers on a Fe(100) whisker / R. . Mahesh [et al.]> // Phys. Rev. B. - 2003. -
Vol. 68
,
Is. 4
. - Ст. 45416,
DOI
10.1103/PhysRevB.68.045416. - Cited References: 42 . - ISSN 1098-0121
РУБ
Physics, Condensed Matter
Рубрики:
FCC-FE FILMS
MAGNETIC SUPERLATTICES
ULTRATHIN FILMS
OSCILLATIONS
CU(100)
SANDWICHES
INTERLAYER
LAYERS
MAGNETORESISTANCE
INTERFACE
Аннотация:
In situ stress measurements have been performed during the deposition of epitaxial Ag monolayers on a Fe whisker. A compressive stress of -0.6 GPa is measured above a 5-ML Ag thickness which is ascribed to the epitaxial misfit of -0.8% between Ag and Fe. Back-extrapolation of the coverage dependent stress measurements to zero coverage reveals an Ag-induced change of the surface stress of Fe(100) of -1.23 N/m. Comparing this surface stress change with the calculated surface stress for Ag(100) suggests a tensile surface stress of +2.05 N/m for clean Fe(100). The deposition of 2 - 5 layers of Ag does not change the stress induced by the first layer significantly. This almost stress free growth is assigned to a rougher surface morphology which is most likely caused by a surface alloy formation.
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Держатели документа:
Max Planck Inst Mikrostrukturphys, D-06120 Halle Saale, Germany
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Доп.точки доступа:
Mahesh, R.; Sander, D.; Zharkov, S. M.; Жарков, Сергей Михайлович; Kirschner, J.
}
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6.
Spin-dependent transport in
alpha-MnS single crystals / S. S. Aplesnin [et al.]> // Phys. Solid State. - 2004. -
Vol. 46
,
Is. 11
. - P. 2067-2072 ; Phys. Solid State. - 2004. -
Vol. 46
,
Is. 11
. - P. 2067-2072,
DOI
10.1134/1.1825551. - Cited References: 11 . - ISSN 1063-7834. - Вариант Sopus
РУБ
Physics, Condensed Matter
Рубрики:
MAGNETORESISTANCE
Аннотация:
The electrical resistivity of single crystal alpha-MnS in crystallographic directions [111] and [100] was found to be anisotropic in the temperature interval 77-300 K. The change in activation energy below the Neel temperature was determined.
Magnetoresistance
was revealed, and reversal of its sign in the (111) plane above the Neel point was found. The experimental data are analyzed in terms of the s-d model, with the manganese ion holes interacting with localized spins assumed to be free carriers. (C) 2004 MAIK "Nauka/Interperiodica".
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Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Akademgorodok, 660036, Russian Federation
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Akademgorodok, 660036, Russian Federation
Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Ryabinkina, L. I.; Рябинкина, Людмила Ивановна; Abramova, G. M.; Абрамова, Галина Михайловна; Romanova, O. B.; Романова, Оксана Борисовна; Kiselev, N. I.; Bovina, A. F.; Бовина, Ася Федоровна
}
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7.
Spin Wave Resonance
in the [(Co0.88Fe0.12)/Cu]N Synthetic Antiferromagnet / I. G. Vazhenina, R. S. Iskhakov, M. A. Milyaev [et al.]> // Tech. Phys. Lett. - 2020. -
Vol. 46
,
Is. 11
. - P. 1076-1079,
DOI
10.1134/S1063785020110140. - Cited References: 19. - This study was carried out under a state order of the Ministry of Science and Higher Education of the Russian Federation (theme "Spin" no. AAAA-A18-118020290104-2) and supported in part by the Russian Foundation for Basic Research (project no. 20-42-660018) . - ISSN 1063-7850. - ISSN 1090-6533
РУБ
Physics, Applied
Рубрики:
MAGNETIC-PROPERTIES
MAGNETORESISTANCE
SPECTRUM
FILMS
Кл.слова (ненормированные):
spin wave resonance
--
synthetic antiferromagnet
--
exchange coupling constant
Аннотация:
The [(Co0.88Fe0.12)/Cu]N synthetic antiferromagnet has been investigated by the spin wave resonance method over the entire range of angles of an external dc magnetic field to the film surface normal. The investigations have shown that the superlattice under study consists of two exchange-coupled magnetic subsystems, each manifested in the recorded spectra as a series of spin-wave modes. The dependence of the linear region of propagation of a standing spin-wave mode on the sample orientation in an external magnetic field has been established.
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Публикация на русском языке
Спин-волновой резонанс в синтетическом антиферромагнетике [(Co0.88Fe0.12)/Cu]N [Текст] / И. Г. Важенина, Р. С. Исхаков, М. А. Миляев [и др.] // Письма в Журн. техн. физ. - 2020. - T. 46 Вып. 21. - С. 28-31
Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Ural Branch, MN Mikheev Inst Met Phys, Ekaterinburg 620108, Russia.
Доп.точки доступа:
Vazhenina, I. G.; Важенина, Ирина Георгиевна; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Milyaev, M. A.; Naumova, L. I.; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Ministry of Science and Higher Education of the Russian Federation [AAAA-A18-118020290104-2]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [20-42-660018]
}
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8.
Self-propagating high-temperature synthesis
and magnetic features of Fe-Al2O3 granulated films / V. G. Myagkov [et al.]> // Phys. Solid State. - 2003. -
Vol. 45
,
Is. 1
. - P. 138-140,
DOI
10.1134/1.1537424. - Cited References: 15 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
THIN-FILMS
MAGNETORESISTANCE
Аннотация:
The classical solid-phase reaction between Fe2O3 and Al layers in thin films is initiated. It is shown that, in the reaction products, Fe granulated films are formed in the Al2O3 nonconducting matrix. Analysis of the reaction equation demonstrates that the volume fraction of iron in the granulated films is less than the percolation threshold. This determines the magnetic properties of iron clusters in a superparamagnetic state. It is assumed that the nanocrystalline microstructure exists in thin films after solid-phase reactions proceeding under conditions of self-propagating high-temperature synthesis. (C) 2003 MAIK "Nauka/Interperiodica".
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Держатели документа:
Russian Acad Sci, Siberian Div, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Russian Acad Sci, Siberian Div, Inst Chem & Chem Technol, Krasnoyarsk 660036, Russia
ИФ СО РАН
ИХХТ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Inst. of Chem./Chemical Technology, Siberian Division, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Доп.точки доступа:
Myagkov, V. G.; Мягков, Виктор Григорьевич; Polyakova, K. P.; Полякова, Клавдия Павловна; Bondarenko, G. N.; Бондаренко, Галина Николаевна; Polyakov, V. V.; Поляков, Виктор Васильевич
}
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9.
Room temperature magneto-transport
properties of nanocomposite Fe–In2O3 thin films / I. A. Tambasov [et al.]> // Physica B. - 2015. -
Vol. 478
. - P. 135-137,
DOI
10.1016/j.physb.2015.08.054. - Cited References: 28. - This study was supported by the Russian Foundation for Basic Research (Grants # 15-02-00948-A,), by the Council for Grants of the President of the Russian Federation (SP-317.2015.1), and by the program of Foundation for Promotion of Small Enterprises in Science and Technology (No 6662 FY2015) ("UMNIK" program). . - ISSN 0921-4526
Перевод заглавия:
Магнитно-транспортные свойства композитных Fe –In2O3 тонких пленок при комнатной температуре
РУБ
Physics, Condensed Matter
Рубрики:
Doped In2O3 Films
High-performance
Indium oxide
Transistors
Magnetoresistance
Ferromagnetism
Кл.слова (ненормированные):
Indium oxide
--
Fe-In2O3 thin films
--
Weak localization
--
Disordered semiconductors
Аннотация:
A ferromagnetic Fe–In2O3 nanocomposite thin film has been synthesized by the thermite reaction Fe2O3+In→Fe–In2O3. Measurements of the Hall carrier concentration, Hall mobility and
magnetoresistance
have been conducted at room temperature. The nanocomposite Fe–In2O3 thin film had n=1.94·1020 cm−3, μ=6.45 cm2/Vs and negative
magnetoresistance
. The
magnetoresistance
for 8.8 kOe was ~−0.22%.The negative
magnetoresistance
was well described by the weak localization and model proposed by Khosla and Fischer.
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Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk Worker 31, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny prospect 79, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Gornakov, K. O.; Myagkov, V. G.; Мягков, Виктор Григорьевич; Bykova, L. E.; Быкова, Людмила Евгеньевна; Zhigalov, V. S.; Жигалов, Виктор Степанович; Matsynin, A. A.; Мацынин, Алексей Александрович; Yozhikova, E. V.
}
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10.
Relaxation of the
remanent resistance of granular HTSC Y-Ba-Cu-O plus CuO composites after magnetic field treatment / D. A. Balaev [et al.]> // Phys. Solid State. - 2008. -
Vol. 50
,
Is. 6
. - P. 1014-1021,
DOI
10.1134/S1063783408060036. - Cited References: 24 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTOR
TRANSPORT CURRENT
FLUX CREEP
YBA2CU3O7-DELTA
MAGNETORESISTANCE
PENETRATION
Аннотация:
The hysteresis of
magnetoresistance
R(H) and relaxation of the remanent resistance R-rem with time after magnetic field treatment of HTSC (Y-Ba-Cu-O) + CuO composites are studied. Such a composite constitutes a network of Josephson junctions wherein the nonsuperconducting component (CuO) forms Josephson barriers between HTSC grains. By comparing the experimental R-rem(t) and R(H) dependences, it is shown that the relaxation of the remanent resistance is caused by the decreased magnetic field in the intergrain medium due to relaxation of magnetization. The reason is uncovered for the differences between the published values of pinning potentials determined by measuring the relaxation of magnetization or resistance and fitting them by the Anderson law.
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Держатели документа:
[Balaev, D. A.
Dubrovskii, A. A.
Popkov, S. I.
Shaikhutdinov, K. A.
Petrov, M. I.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskii, A. A.; Дубровский, Андрей Александрович; Popkov, S. I.; Попков, Сергей Иванович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Petrov, M. I.; Петров, Михаил Иванович
}
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11.
Mossbauer studies of
FexMn1-xS single crystals / G. M. Abramova [et al.]> // Phys. Solid State. - 2008. -
Vol. 50
,
Is. 2
. - P. 237-240,
DOI
10.1134/S1063783408020042. - Cited References: 16 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
METAL-INSULATOR-TRANSITION
MAGNETIC-PROPERTIES
ALPHA-MNS
SULFIDES
MAGNETORESISTANCE
PRESSURE
SYSTEM
OXIDES
Аннотация:
Single crystals of iron manganese sulfides FexMn1-xS (0.25
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Держатели документа:
[Abramova, G. M.
Petrakovskii, G. A.
Bayukov, O. A.
Bovina, A. F.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Varnek, V. A.
Sokolov, V. V.] Russian Acad Sci, Siberian Branch, Nikolaev Inst Inorgan Chem, Novosibirsk 630090, Russia
ИФ СО РАН
Доп.точки доступа:
Abramova, G. M.; Абрамова, Галина Михайловна; Petrakovskii, G. A.; Петраковский, Герман Антонович; Bayukov, O. A.; Баюков, Олег Артемьевич; Varnek, V. A.; Sokolov, V. V.; Bovina, A. F.; Бовина, Ася Федоровна
}
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12.
Mechanisms of dissipation
in a Josephson medium based on a high-temperature superconductor in a magnetic field / D. A. Balaev [et al.]> // Phys. Solid State. - 2006. -
Vol. 48
,
Is. 5
. - P. 826-832,
DOI
10.1134/S1063783406050039. - Cited References: 32 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
RESISTIVE TRANSITION
PHASE-SLIP
TRANSPORT-PROPERTIES
MAGNETORESISTANCE
SYSTEM
MODEL
YBA2CU3O7-X
PENETRATION
COMPOSITES
HYSTERESIS
Аннотация:
This paper reports on the results of an investigation into the influence of magnetic fields (0-60 kOe) on the temperature dependences of the electrical resistance R(T) of the Y3/4Lu1/4Ba2Cu3O7 + CuO composites. The structure of these composites is considered to be a network of tunnel-type Josephson junctions in which a nonsuperconducting component (CuO) forms boundaries (barriers) between high-temperature superconducting crystallites. The temperature dependence R(T) of the composites has two steps characteristic of granular superconductors: (i) an abrupt change in the electrical resistance at the critical temperature of high-temperature superconducting crystallites and (ii) a smooth transition to the superconducting state under the influence of the boundaries between the crystallites. The experimental dependences R(T) are analyzed within the Ambegaokar-Halperin model of thermal fluctuations in Josephson junctions and the flux creep model. An increase in the magnetic field leads to a crossover from the Ambegaokar-Halperin mechanism to the flux creep mechanism. The temperature dependences R(T) in the range of weak magnetic fields (from 0 to 10(2) Oe) are adequately described by the relationship following from the Ambegaokar-Halperin model. In the range of strong magnetic fields (from 10(3) to 6 x 10(4) Oe), the dissipation obeys the Arrhenius law R similar to exp(-U(H)/T)], which is characteristic of the flux creep model with a temperature-independent pinning energy U(H). The effective Josephson coupling energies and the pinning energies corresponding to the Ambegaokar-Halperin and flux creep mechanisms are determined.
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Держатели документа:
Russian Acad Sci, Siberian Div, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Popkov, S. I.; Попков, Сергей Иванович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Petrov, M. I.; Петров, Михаил Иванович
}
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13.
Magnetotransport effects and
electronic phase separation in manganese sulfides with electron-hole doping / O. B. Romanova, S. S. Aplesnin, M. N. Sitnikov, L. V. Udod> // J. Exp. Theor. Phys. - 2021. -
Vol. 132
,
Is. 5
. - P. 831-842,
DOI
10.1134/S106377612103016X. - Cited References: 38. - This study was supported by the Russian Foundation for Basic Research and the Belarussian Republic Foundation for Basic Research (project no. 20-52-00005) . - ISSN 1063-7761. - ISSN 1090-6509
РУБ
Physics, Multidisciplinary
Рубрики:
MAGNETIC-PROPERTIES
TRANSITION
MAGNETORESISTANCE
Аннотация:
We analyze the effect of electron and hole doping with a low substituent concentration (x = 0.01) on the magnetic and electron subsystems in disordered semiconductors MexMn1-xS (Me = Ag and Tm) in a wide range of temperatures (77–1000 K) and magnetic fields up to 12 kOe. Using magnetic measurements, we have established the domains of ferron (polaron) formation in the vicinity of the magnetic phase transition. We have detected the magnetoimpedance and
magnetoresistance
, the magnitude and sign of which depend on the electric field, temperature, and the type of the substituent element. We have determined the temperatures of thermopower peaks associated with deformation of the crystalline structure. We have established the phonon and magnon contributions to charge carrier relaxation using the method of impedance spectroscopy and the Jahn–Teller mode of oscillations from the IR spectra for the system containing silver. We have determined the diffusion contribution to the conductivity from the impedance hodograph in TmxMn1-xS semiconductors. The experimental results are described using the models of supermagnetic clusters, ferroelectric domains, and the Debye model.
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Публикация на русском языке
Магнитотранспортные эффекты и электронное фазовое расслоение в сульфидах марганца с электронно-дырочным допированием [Текст] / О. Б. Романова, С. С. Аплеснин, М. Н. Ситников, Л. В. Удод // Журн. эксперим. и теор. физ. - 2021. - Т. 159 Вып. 5. - С. 938-951
Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.
Доп.точки доступа:
Romanova, O. B.; Романова, Оксана Борисовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Sitnikov, M. N.; Udod, L. V.; Удод, Любовь Викторовна; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Belarussian Republic Foundation for Basic Research [20-52-00005]
}
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14.
Magnetoelectric effect in
CoFeB/MgO/CoFeB magnetic tunnel junctions / I. Y. Pashen'kin, M. V. Sapozhnikov, N. S. Gusev [et al.]> // JETP Lett. - 2020. -
Vol. 111
,
Is. 12
. - P. 690-693,
DOI
10.1134/S0021364020120115. - Cited References: 13 . - ISSN 0021-3640. - ISSN 1090-6487
Рубрики:
SPIN-TRANSFER-TORQUE
TOGGLE MRAM
MAGNETORESISTANCE
Аннотация:
The possibility of electrical control of the interlayer exchange interaction in CoFeB/MgO/CoFeB tunnel junctions exhibiting
magnetoresistance
of ~200% is studied. It is shown that the increase in the applied voltage from 50 mV to 1.25 V leads to a shift of the magnetization curve of the free layer by 10 Oe at a current density of ~103 A/cm2. The discovered effect can be used in the development of energy-efficient random access memory.
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Публикация на русском языке
Магнитоэлектрический эффект в туннельных магниторезистивных контактах CoFeB/MgO/CoFeB [Текст] / И. Ю. Пашенькин, М. В. Сапожников, Н. С. Гусев [и др.] // Письма в ЖЭТФ. - 2020. - Т. 111 Вып. 12. - С. 815-818
Держатели документа:
Russian Acad Sci, Inst Phys Microstruct, Nizhnii Novgorod 603950, Russia.
Lobachevsky State Univ Nizhny Novgorod, Nizhnii Novgorod 603950, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Pashen'kin, I. Yu; Sapozhnikov, M., V; Gusev, N. S.; Rogov, V. V.; Tatarskii, D. A.; Fraerman, A. A.; Volochaev, M. N.; Волочаев, Михаил Николаевич
}
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15.
Magnetic properties, morphology
and interfaces of (Fe/Si)n nanostructures / Bartolome J. [et al.]> //
J. Magn. Magn. Mater. - 2016. -
Vol. 400
. - P. 271-275,
DOI
10.1016/j.jmmm.2015.07.046. - Cited References: 43. - The financial support of the Spanish MINECOMAT2011-23791 and MAT2015-53921-R, Aragonese DGA-IMANAE34 (cofounded by Fondo Social Europeo) and European FEDER funds is acknowledged. Program of the President of the Russian Federation for the support of leading scientific schools (Scientific School 2886.2014.2), RFBR (Grant no. 13-02-01265), the Ministry of Education and Science of the Russian Federation (State contract no. 02.G25.31.0043 and State task no. 16.663.2014К) . - ISSN 0304-8853
РУБ
Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
INTERLAYER EXCHANGE
Fe/Si(100) INTERFACE
SILICIDE FORMATION
ULTRAHIGH-VACUUM
FILMS
IRON
MAGNETORESISTANCE
SUPERLATTICES
SPECTROSCOPY
DEPOSITION
Аннотация:
A systematic study of the iron–silicon interfaces formed upon preparation of (Fe/Si) multilayers has been performed by the combination of modern and powerful techniques. Samples were prepared by molecular beam epitaxy under ultrahigh vacuum onto Si wafers or single crystalline Ag(100) buffer layers grown on GaAs(100). The morphology of these films and their interfaces was studied by a combination of scanning transmission electron microscopy, X-ray reflectivity, angle resolved X-ray photoelectron spectroscopy and hard X-ray photoelectron spectroscopy. The Si-on-Fe interface thickness and roughness were determined to be 1.4(1) nm and 0.6(1) nm, respectively. Moreover, determination of the stable phases formed at both Fe-on-Si and Si-on-Fe interfaces was performed using conversion electron Mössbauer spectroscopy on multilayers with well separated Si-on-Fe and Fe-on-Si interfaces. It is shown that while a fraction of Fe remains as α-Fe, the rest has reacted with Si, forming the paramagnetic FeSi phase and a ferromagnetic Fe rich silicide. We conclude that there is an identical paramagnetic c-Fe1−xSi silicide sublayer in both Si-on-Fe and Fe-on-Si interfaces, whereas an asymmetry is revealed in the composition of the ferromagnetic silicide sublayer.
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Доп.точки доступа:
Bartolome, J.; Badía-Romano, L.; Rubin J.; Bartolome F.; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Burgler D.E.; International Conference on Magnetism(20 ; 2015 ; Jul ; 5-10 ; Barselona, Spain)
Свободных экз. нет
}
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16.
Magnetic and electrical
properties of cation-substituted sulfides Me (x) Mn1-x S (Me = Co, Gd) / S. S. Aplesnin [et al.]> // Phys. Solid State. - 2009. -
Vol. 51
,
Is. 4
. - P. 698-701,
DOI
10.1134/S1063783409040076. - Cited References: 17. - This study was supported by the Russian Foundation for Basic Research RFFI-BRFFI (project no. 0802-90031) and FFIRB (project no. F08R-037). . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
ALPHA-MNS
MAGNETORESISTANCE
TRANSPORT
Аннотация:
The temperature dependences of the specific magnetization sigma and the electrical resistivity rho of Me (x) Mn1 - x S single crystals (Me= Co, Gd; x= 0.05) have been studied in the temperature range 80 K T 1000 K. The samples under study have revealed the presence of a spontaneous magnetic moment below the N,el temperature (T (N)) and ferromagnetic clusters in Gd0.05Mn0.95S in the temperature range 146 K T 680 K. Substitution of gadolinium for manganese initiates a transition from p-type to n-type conduction. The change in the conduction type is accompanied by an increase in the electrical resistivity at 300 K by approximately one order of magnitude and, accordingly, by a decrease in the activation energy. The magnetic and electrical properties of the crystals under study have been interpreted in terms of the cluster model with temperature-dependent ferromagnetic exchange and an electron localized in this cluster.
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Держатели документа:
[Aplesnin, S. S.
Ryabinkina, L. I.
Romanova, O. B.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
[Sokolov, V. V.
Pichugin, A. Yu.] Russian Acad Sci, Siberian Branch, Inst Inorgan Chem, Novosibirsk 630090, Russia
[Galyas, A. I.
Demidenko, O. F.
Makovetskii, G. I.
Yanushkevich, K. I.] Natl Acad Sci Belarus, Sci Pract Mat Res Ctr, Minsk 220072, Byelarus
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation
Reshetnev Siberian State Aerospace University, pr. im. Gazety Krasnoyarski rabochi 31, Krasnoyarsk 660014, Russian Federation
Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, ul. Akademika Lavrent'eva 3, Novosibirsk 630090, Russian Federation
Scientific-Practical Materials Research Centre, National Academy of Sciences of Belarus, ul. P. Brovki 19, Minsk 220072, Belarus
Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Ryabinkina, L. I.; Рябинкина, Людмила Ивановна; Romanova, O. B.; Романова, Оксана Борисовна; Sokolov, V. V.; Pichugin, A. Y.; Galyas, A. I.; Demidenko, O. F.; Makovetskii, G. I.; Yanushkevich, K. I.; Russian Foundation for Basic Research RFFI-BRFFI [0802-90031]; FFIRB [F08R-037]
}
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17.
Kolovsky, A. R.
Hall conductivity beyond the linear response regime / A. R. Kolovsky> // Europhys. Lett. - 2011. -
Vol. 96
,
Is. 5
. - Ст. 50002,
DOI
10.1209/0295-5075/96/50002. - Cited References: 24. - This work was supported by Russian Foundation for Basic Research, grant RFBR-10-02-00171-a. . - ISSN 0295-5075
РУБ
Physics, Multidisciplinary
Рубрики:
MAGNETIC-FIELDS
ANTIDOT ARRAYS
NEUTRAL ATOMS
SUPERLATTICES
MAGNETORESISTANCE
TRANSPORT
ELECTRONS
Аннотация:
This paper introduces a semi-analytical method for calculating the Hall conductivity in the single-band approximation. The method goes beyond the linear response theory and thus, it formally imposes no limitation on the electric-field magnitude. It is shown that, when the Bloch frequency exceeds the cyclotron frequency, the Hall current decreases with increasing electric field. The obtained results can be directly applied to the cold Bose atoms in a 2D optical lattice, where the single-band approximation is well justified. Copyright (C) EPLA, 2011
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Держатели документа:
[Kolovsky, A. R.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Kolovsky, A. R.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, 660036 Krasnoyarsk, Russian Federation
Siberian Federal University, 660041 Krasnoyarsk, Russian Federation
Доп.точки доступа:
Коловский, Андрей Радиевич
}
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18.
Intrinsic inhomogeneity in
a (La0.4Eu0.6)(0.7)Pb0.3MnO3 single crystal: Magnetization, transport, and electron magnetic resonance studies / N. . Volkov [et al.]> // Phys. Rev. B. - 2006. -
Vol. 73
,
Is. 10
. - Ст. 104401,
DOI
10.1103/PhysRevB.73.104401. - Cited References: 29 . - ISSN 1098-0121
РУБ
Physics, Condensed Matter
Рубрики:
INSULATOR-METAL TRANSITION
PHASE-SEPARATION
MAGNETORESISTANCE
MANGANITES
EXCHANGE
STATE
Аннотация:
Conventional magnetic and transport measurements of the melt-grown mixed-valence manganite (La0.4Eu0.6)(0.7)Pb0.3MnO3 have been supplemented by a magnetic resonance study. The experimental data support the model of two magnetic phases coexisting in the crystal volume. At a temperature T-*, which is well above Curie temperature T-C, ferromagnetic clusters appear in the sample. These ferromagnetic regions possess a higher conductivity in comparison with the paramagnetic background (majority phase). On cooling through T-C, the magnetization of the spatially confined ferromagnetic clusters of the minority phase freezes in random directions with respect to the magnetization of the ferromagnetic majority phase due to the difference of the exchange interactions at the phase boundaries from the intraphase interactions in sign and value. Such a mixed state is responsible for the observed magnetic glassylike behavior of the system that is characteristic of inhomogeneous magnets. The fluctuations of the magnetic coupling value and sign in the sample volume are related to strong competition between the ferromagnetic and antiferromagnetic exchange interactions, which, in turn, results from the quenched disorder caused by the random chemical replacement of the perovskite A site of the manganite. A phase-separation state comprised of two different ferromagnetic phases has been used to account for the colossal
magnetoresistance
phenomenon and the magnetic-field-driven nonlinear conduction found in the crystal.
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Держатели документа:
SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Tech Univ Munich, Phys Dept E21, D-85747 Garching, Germany
ИФ СО РАН
L. V. Kirensky Institute of Physics SB RAS, Krasnoyarsk 660036, Russian Federation
Physics-Department E21, Technical University of Munich, D-85747 Garching, Germany
Доп.точки доступа:
Volkov, N. V.; Волков, Никита Валентинович; Petrakovskii, G. A.; Петраковский, Герман Антонович; Patrin, K. G.; Патрин, Константин Геннадьевич; Sablina, K. A.; Саблина, Клара Александровна; Eremin, E. V.; Еремин, Евгений Владимирович; Vasiliev, V.; Vasiliev, A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Boni, P.; Clementyev, E.
}
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19.
Hall effect in
the FexMn1-xS magnetic semiconductors / L. I. Ryabinkina [et al.]> // Phys. Solid State. - 2004. -
Vol. 46
,
Is. 6
. - P. 1068-1072,
DOI
10.1134/1.1767246. - Cited References: 17 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
MAGNETORESISTANCE
FIELDS
MNS
Аннотация:
The electrical properties and the Hall effect in the FexMn1-xS magnetic semiconductors (0less than or equal toxless than or equal to0.5) have been experimentally studied in the range 77-300 K in magnetic fields of up to 15 kOe. The cation-substituted sulfides with 0.25less than or equal toxless than or equal to0.3 possessing colossal
magnetoresistance
(CMR) were established to be narrow-gap semiconductors with carrier concentrations nsimilar to10(11)-10(15) cm(-3) and high carrier mobilities musimilar to 10(2)-10(4) cm(2) V-1 s(-1). It is believed that the CMR effect in these sulfides can be explained in terms of the model of magnetic and electron phase separation, which is analogous to the percolation theory in the case of heavily doped semiconductors. (C) 2004 MAIK "Nauka/Interperiodica".
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Ryabinkina, L. I.; Рябинкина, Людмила Ивановна; Abramova, G. M.; Абрамова, Галина Михайловна; Romanova, O. B.; Романова, Оксана Борисовна; Kiselev, N. I.
}
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20.
Fransson, J.
Many-body approach to spin-dependent transport in quantum dot systems / J. . Fransson, O. . Eriksson, I. . Sandalov> // Phys. Rev. Lett. - 2002. -
Vol. 88
,
Is. 22
. - Ст. 226601,
DOI
10.1103/PhysRevLett.88.226601. - Cited References: 37 . - ISSN 0031-9007
РУБ
Physics, Multidisciplinary
Рубрики:
SINGLE-ELECTRON TRANSISTOR
COULOMB-BLOCKADE
ANDERSON IMPURITY
ROOM-TEMPERATURE
TUNNEL-JUNCTIONS
EVEN NUMBER
MODEL
MAGNETORESISTANCE
OSCILLATIONS
CONDUCTANCE
Аннотация:
By means of a diagram technique for Hubbard operators, we show the existence of a spin-dependent renormalization of the localized levels in an interacting region, e.g., quantum dot, modeled by the Anderson Hamiltonian with two conduction bands. It is shown that the renormalization of the levels with a given spin direction is due to kinematic interactions with the conduction subbands of the opposite spin. The consequence of this dressing of the localized levels is a drastically decreased tunneling current for ferromagnetically ordered leads compared to that of paramagnetically ordered leads. Furthermore, the studied system shows a spin-dependent resonant tunneling behavior for ferromagnetically ordered leads.
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Держатели документа:
Univ Uppsala, Condensed Matter Theory Grp, S-75121 Uppsala, Sweden
RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Доп.точки доступа:
Eriksson, O.; Sandalov, I.
}
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