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Воронов, Владимир Николаевич.
Исследование локальных парамагнитных центров перовскитоподобных кристаллов методом ЭПР / В. Н. Воронов, Э. А. Петраковская // Физ. тверд. тела. - 2013. - Т. 55, Вып. 4. - С. 671-677. - Работа поддержана проектом НШ 4828.2012.2
Аннотация: В монокристаллах ScF3 (чистого и допированного), а также в кристаллах Rb2KScF6, Rb2KDyF6 с перовскитоподобной структурой обнаружены и исследованы точечные нанодефекты (вакансии на месте трехвалентных катионов). Исследования локальных парамагнитных центров, которые не регистрируются рентгенографией, проводились методом ЭПР. Угловая зависимость спектров указывает на локальное искажение кубической симметрии кристаллов. Наличие дополнительной сверхтонкой структуры в наблюдаемых спектрах обусловлено делокализацией электронов по шести ионам F-, образующим первый координационный полиэдр вокруг вакансии. Изученные кристаллы характеризуются большой электронной подвижностью и высокой скоростью электронов, зависящей от примеси. Высокая подвижность электронов катионного центра может быть косвенной причиной структурного фазового перехода в кристалле ScF3 при воздействии одноосного давления.

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Переводная версия EPR investigation of local paramagnetic centers in perovskite-like crystals. - [Б. м. : б. и.]

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

Доп.точки доступа:
Петраковская, Элеонора Анатольевна; Petrakovskaya, E.A.; Voronov V.N.
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Voronov, V. N.
EPR investigation of local paramagnetic centers in perovskite-like crystals / V. N. Voronov, E. A. Petrakovskaya // Phys. Solid State. - 2013. - Vol. 55, Is. 4. - P. 730-736DOI 10.1134/S1063783413040367
Аннотация: In ScF3 single crystals (pure and doped) as well as in Rb2KScF6 and Rb2KDyF6 crystals with a perovskite-like structure, point nanodefects (vacancy in place of trivalent cations) have been found and studied. Electron paramagnetic resonance has been used to investigate local paramagnetic centers that are not detected using X-ray diffraction. The angular dependence of the spectra indicates a local distortion of the cubic symmetry of the crystals. An additional hyperfine structure in the observed spectra is due to the delocalization of electrons over six F− ions forming the first coordination polyhedron around the vacancy. The crystals studied are characterized by a high electron mobility and a high electron velocity, which depends on the impurity. The high mobility of electrons of the cation center can be indirectly responsible for the structural phase transition occurring in the ScF3 crystal under uniaxial pressure.

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Публикация на русском языке Воронов, Владимир Николаевич. Исследование локальных парамагнитных центров перовскитоподобных кристаллов методом ЭПР / В. Н. Воронов // Физика твердого тела. - 2013. - Т. 55, Вып. 4. - С. 671-677

Доп.точки доступа:
Petrakovskaya, E. A.; Петраковская, Элеонора Анатольевна; Воронов, Владимир Николаевич
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    Magnetoelectric polarization of paramagnetic HoAl[[d]]3-x[[/d]]Ga[[d]]x[[/d]](BO[[d]]3[[/d]])[[d]]4[[/d]] single crystals / I. A. Gudim [и др.] // V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism : abstracts. - Vladivostok : FEFU, 2013 = EASTMag-2013. - P45 . - ISBN 978-5-7444-3124-2
   Перевод заглавия: Магнитоэлектрическая поляризация парамагнитных монокристаллов HoAl3-XGaX(BO3)4
Аннотация: Показана зависимость магнитоэлектрической поляризации от состава кристалла и соотношения левых и правых энантиомеров.

Доп.точки доступа:
Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Temerov, V. L.; Темеров, Владислав Леонидович; Volkov, N. V.; Волков, Никита Валентинович; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; Sept. ; 15-21 ; Vladivostok)
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Magnetoelectric polarization of paramagnetic Ho[[d]]1-x[[/d]]Nd[[d]]x[[/d]]Al(BO[[d]]3[[/d]])[[d]]4[[/d]] single crystals [Текст] / E. V. Eremin [и др.] // V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism : abstracts. - Vladivostok : FEFU, 2013. - С. 81 . - ISBN 978-5-7444-3124-2

Доп.точки доступа:
Eremin, E. V.; Еремин, Евгений Владимирович; Gudim, I. A.; Гудим, Ирина Анатольевна; Molokeev, M. S.; Молокеев, Максим Сергеевич; Temerov, V. L.; Темеров, Владислав Леонидович; Volkov, N. V.; Волков, Никита Валентинович; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; Sept. ; 15-21 ; Vladivostok)
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    Multiband description of optical conductivity in ferropnictide superconductors / O. V. Dolgov [et al.] // J. Supercond. Nov. Magn. - 2013. - Vol. 26, Is. 8. - P. 2637-2640, DOI 10.1007/s10948-013-2150-3 . - ISSN 1557-1939
   Перевод заглавия: Многозонное описание оптической проводимости в ферропниктидных сверхпроводниках
Кл.слова (ненормированные):
Effects of disorder -- Multiband superconductivity -- Optical conductivity -- Effects of disorder -- Experimental datum -- Multi-band superconductors -- Multiband superconductivity -- Novel superconductor -- Order parameter symmetry -- Paramagnetic impurity -- Single-band superconductors -- Optical conductivity -- Paramagnetism -- Superconductivity -- Superconducting materials
Аннотация: We study optical properties of the multiband superconductors with an s В± order parameter symmetry. By comparing results of our theory with experimental data on optical conductivity for Ba0.68K 0.32Fe2As2 single crystals, we show that satisfactory description of the novel superconductors can be obtained only considering a strong electron-boson coupling. We reexamine the effect of disorder and demonstrate that multiband superconductors are more robust with respect to it than naively expected by simple analogy with paramagnetic impurities in single-band superconductors. Moreover, disorder may give rise to new effects, in particular to a phase transition s В±>s ++. We discuss how the systematic study of disorder impact on the density of states and the optical conductivity may provide information on the underlying order parameter structure. В© 2013 Springer Science+Business Media New York.

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Держатели документа:
Max Planck Inst Solid State Res, Stuttgart, Germany
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk, Russia
Fac Sci & Technol, Enschede, Netherlands
MESA Inst Nanotechnol, Enschede, Netherlands

Доп.точки доступа:
Dolgov, O. V.; Efremov, D. V.; Korshunov, M. M.; Коршунов, Максим Михайлович; Charnukha, A.; Boris, A. V.; Golubov, A. A.
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Magnetic and resonance properties of Bi24(CoBi)O40 / S. S. Aplesnin [et al.] // J. Korean Phys. Soc. - 2013. - Vol. 63, Is. 3. - P. 293-295, DOI 10.3938/jkps.63.293 . - ISSN 0374-4884
Кл.слова (ненормированные):
Curie-Weiss law -- g-factor -- Magnetic susceptibility -- Paramagnetic Neel temperature
Аннотация: Temperature and field dependences of the magnetic moment in the temperature range 4 K < T < 300 K and electron spin resonance linewidths and the g-factor in the temperature range 80 K < T < 300 K for the Bi24(CoBi)O40 compound synthesized by the solid-state reaction are analyzed. The magnetic susceptibility of Bi24(CoBi)O40 within the range 4 K < T < 300 K is described well by the Curie-Weiss law with the negative paramagnetic Curie temperature ? = -12.3 K and the effective magnetic moment ? = 5.08?B. The g-factor and the ESR linewidth grow with temperature. В© 2013 The Korean Physical Society.

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Держатели документа:
MF Reshetneva Aerocosm Siberian State Univ, Krasnoyarsk 660014, Russia
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Udod, L. V.; Удод, Любовь Викторовна; Sitnicov, M. N.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич
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Magnetic and thermophysical properties of GdxMn1-xS solid solutions / S. S. Aplesnin [et al.] // J. Phys.: Condens. Matter. - 2013. - Vol. 25, Is. 2. - Ст. 025802. - P. , DOI 10.1088/0953-8984/25/2/025802 . - ISSN 0953-8984
Кл.слова (ненормированные):
Antiferromagnetic orders -- Band state -- Face-centered cubic lattices -- Magnetic phase transitions -- Paramagnetic phase -- Temperature dependence -- Antiferromagnetism -- Electron transitions -- Gadolinium -- Manganese -- Paramagnetism -- Sodium chloride -- Specific heat -- Organic polymers
Аннотация: The structural, magnetic, and thermophysical properties of cation-substituted sulfides GdXMn1-XS (0.04 ? X ? 0.25) with the NaCl-type face-centered cubic lattice have been investigated. The range of existence of long-range antiferromagnetic order has been established. The anomalies observed in the temperature dependence of the specific heat correspond to the temperatures of the magnetic phase transition. The anomaly in the specific heat caused by electron transitions between the 4f levels and d band states has been observed. It has been found that the coefficient of thermal expansion decreases with increasing concentration of substituents in the magnetically ordered region and remains nearly invariable in the paramagnetic phase. В© 2013 IOP Publishing Ltd.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Daghestan Sci Ctr, Amirkhanov Inst Phys, Makhachkala 367003, Russia

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Romanova, O.; Романова, Оксана Борисовна; Gorev, M. V.; Горев, Михаил Васильевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Gamzatov, A. G.; Aliev, A. M.
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Magnetic properties and morphology of manganese ferrite nanoparticles in glasses / I. Edelman [et al.] // IOP Conf. Ser.: Mater. Sci. Eng. - 2011. - Vol. 25, Is. 1. - Ст. 012017, DOI 10.1088/1757-899X/25/1/012017
Кл.слова (ненормированные):
Average diameter -- Borate glass -- Co-doped -- Electron magnetic resonance -- Magnetic and magneto-optical properties -- Magnetic behaviour -- Magnetic circular dichroisms -- Magnetic nanoparticles -- Magnetically ordered material -- Manganese ferrite nanoparticles -- Manganese ferrites -- Morphological characteristic -- Paramagnetic ions -- Resonance field -- Size and shape -- Static magnetization -- Temperature dependence -- Temperature dependent -- Variable temperature -- Visible and near infrared -- Alumina -- Dichroism -- Ferrite -- Glass -- Iron oxides -- Magnetic properties -- Magnetic resonance -- Magnetocrystalline anisotropy -- Manganese -- Manganese oxide -- Nanoparticles -- Paramagnetism -- Silicates -- Spectroscopy -- Nanomagnetics
Аннотация: Static magnetization (SM), magnetic circular dichroism (MCD) and electron magnetic resonance (EMR) studies are reported of borate glasses 22.5 K 2O-22.5 Al 2O 3-55 B 2O 3 co-doped with iron and manganese oxides. In as-prepared glasses the paramagnetic ions usually are in diluted state; however, if the ratio of the iron and manganese oxides in the charge is 3/2, magnetic nanoparticles are found already in as-prepared glass. After additional thermal treatment all glasses show magnetic behaviour, MCD and EMR due to the presence of magnetic nanoparticles with characteristics close to those of manganese ferrite. By computer simulating the EMR spectra at variable temperatures, their morphological characteristics are deduced: relatively broad size and shape distribution with average diameter of ca. 3-4 nm. The characteristic temperature-dependent shift of the apparent resonance field is explained by a strong temperature dependence of the magnetocrystalline anisotropy in the nanoparticles. The potassium-alumina-borate glasses containing magnetic nanoparticles represent a novel class of materials: "transparent magnets". Indeed, they remain transparent in a part of visible and near infrared spectral range while showing magnetic and magneto-optical properties characteristic of magnetically ordered materials.

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Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Ivanova, O. S.; Иванова, Оксана Станиславовна; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Petrakovskaja, E. A.; Петраковская, Элеонора Анатольевна; Artemenko, A.; Curely, J.; Kliava, J.; Zaikovskiy, V. I.; Stepanov, S.; Baltic Conference on Silicate Materials(5 ; 2011 ; May ; 23-25 ; Riga, Latvia)
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    Magnetoelectric polarization of paramagnetic Ho1-xNdxAl3(BO3)4 single crystals / E. V. Eremin [et al.] // V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism : abstracts. - Vladivostok : FEFU, 2013. - P. 82 . - ISBN 978-5-7444-3124-2
   Перевод заглавия: Магнитоэлектрическая поляризация парамагнитного Ho1-xNdxAl3(BO3)4
Аннотация: При замещении в редкоземельной подсистеме более крупного иона гольмия меньшим по радиусу ионом неодима, происходит уменьшение величин продольной и поперечной магнитоэлектрических поляризаций. Инверсионное же двойникование в кристаллах меняется существенно нелинейно. Вероятно величина МЭ поляризации зависит не только от состава кристалла, но и от соотношения двойников в нем.

Доп.точки доступа:
Eremin, E. V.; Еремин, Евгений Владимирович; Gudim, I. A.; Гудим, Ирина Анатольевна; Molokeev, M. S.; Молокеев, Максим Сергеевич; Temerov, V. L.; Темеров, Владислав Леонидович; Volkov, N. V.; Волков, Никита Валентинович; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; Sept. ; 15-21 ; Vladivostok)
}
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10.

    Magnetoelectric polarization of paramagnetic HoAl3-XGaX(BO3)4 single crystals / I. A. Gudim [et al.] // Solid State Phenom. : Selected, peer reviewed papers. - 2014. - Vol. 215: Trends in Magnetism: Nanomagnetism (EASTMAG-2013). - P. 364-367, DOI 10.4028/www.scientific.net/SSP.215.364. - Cited References: 4. - This study was supported by the President of the Russian Federation, Grant for Support of Leading Scientific Schools no. 4828.2012.2; the Ministry of Education and Science of the Russian Federation, project no. 8365; and the Russian Foundation for Basic Research, project no. 13-02-12442 . - ISSN 978-30383. - ISSN 1662-9779
   Перевод заглавия: Магнетоэлектрическая полярицация парамагнитного монокристалла HoAl3-xGax(BO3)4
Кл.слова (ненормированные):
single crystal -- magnetoelectric polarization -- twinning
Аннотация: HoAl3-xGax(BO3)4 (0 ≤ х ≤ 3) single crystals were grown from Bi2Mo3O12–Li2MoO4-based fluxes. Structural inversion twinning depending on crystal composition and heat treatment conditions is revealed. It is established that upon substitution of Ga3+ ions for Al3+ the magnetic characteristics of the crystals do not significantly change, while the magnetoelectric polarization decreases with increasing gallium content. The measured value and sign of polarization charges depend on a ratio between the left and right isomers.

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Доп.точки доступа:
Ovchinnikov, S. G. \ed.\; Овчинников, Сергей Геннадьевич; Samardak, A. \ed.\; Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Temerov, V. L.; Темеров, Владислав Леонидович; Volkov, N. V.; Волков, Никита Валентинович; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; sept. ; 15-21 ; Vladivostok)
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11.

Size control in the formation of magnetite nanoparticles in the presence of citrate ions / V. L. Kirillov [et al.] // Mater. Chem. Phys. - 2014. - Vol. 145, Is. 1-2. - P. 75-81, DOI 10.1016/j.matchemphys.2014.01.036. - Cited References: 46. - This work was supported by the Interdisciplinary Integration Project no. 45 of the Siberian Branch of the Russian Academy of Sciences for 2012-2014. . - ISSN 0254-0584. - ISSN 1879-3312

РУБ Materials Science, Multidisciplinary
Рубрики:
OLEIC-ACID
   CATALYST
   HYPERTHERMIA
   PARTICLES
   OXIDATION
   REMOVAL
   CO
Кл.слова (ненормированные):
Magnetic materials -- Magnetic properties -- Precipitation -- Electron paramagnetic resonance
Аннотация: A one-pot synthesis method for the controllable growth of magnetite nanoparticles directly during the process of co-precipitation using citrate ions was developed. The effects of the concentration of citrate ions and the solution pH on the characteristics of magnetite particles with sizes in the range of 4-10 nm synthesized by the method of co-precipitation were studied. The results showed that the specified concentration of citrate ions allowed the preparation of magnetite particles with a definite size that exhibited superparamagnetic behaviour in a particular temperature range. As the concentration ratio of citrate to iron ions was increased from 0 to 0.11, the average size of the prepared magnetite particles decreased from 10.5 to 4.4 nm. As a result, the superparamagnetic blocking temperature decreased from 300 to 20 K, the saturation magnetisation decreased from 50 to 20 emu g(-1), and the average magnetic moment decreased from 8000 mu(B) to 340 mu(B) (at T = 300 K). The obtained experimental data proved that the size effects of the magnetite nanoparticles can be attributed to the capping of the magnetite surface by adsorbed citrate ions. Thus, the suggested approach allows magnetite nanoparticles to be prepared with an optimum particle size around superparamagnetic threshold that prevents their irreversible agglomeration and simultaneously allows them to be removed from a solution at an acceptable rate. (C) 2014 Elsevier B.V. All rights reserved.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 630090, Russia
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Kirillov, V. L.; Balaev, D. A.; Балаев, Дмитрий Александрович; Semenov, S. V.; Семёнов, Сергей Васильевич; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Martyanov, O. N.; Siberian Branch of the Russian Academy of Sciences
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12.

Aplesnin, S. S.
Magnetotransport effects in paramagnetic GdxMn1-xS / S. S. Aplesnin, M. N. Sitnikov // JETP Letters. - 2014. - Vol. 100, Is. 2. - P. 95-101, DOI 10.1134/S0021364014140021. - Cited References: 12. - This work was supported by the Russian Foundation for Basic Research (project nos. 12-02-00125-a and 14-02-90010-Bel_a). . - ISSN 0021-3640. - ISSN 1090-6487

РУБ Physics, Multidisciplinary
Рубрики:
PHASE-SEPARATION
SPINTRONICS
MANGANITES
Аннотация: The electrical resistance of GdxMn1 − xS solid solutions with x = 0.1, 0.15, and 0.2 has been measured at magnetic field H = 0.8 T and at zero magnetic field within the 100 K ˂ T ˂ 550 K temperature range. The magnetoresistance peak is observed above room temperature. On heating, the composition with x = 0.2 exhibits the change of magnetoresistance sign from positive to negative and the magnetoresistance peak near the transition to the magnetically ordered state. The experimental data are interpreted in the framework of the model involving the orbital ordering of electrons and the arising electrical polarization leading to the changes in the spectral density of states for electrons in the vicinity of the chemical potential in the applied magnetic field.

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Публикация на русском языке Аплеснин, Сергей Степанович. Магнитотранспортные эффекты в парамагнитном состоянии в GdxMn1−xS [Текст] / С. С. Аплеснин, М. Н. Ситников // Письма в "Журнал экспериментальной и теоретической физики" : Наука, 2014. - Т. 100 Вып. 1-2. - С. 104-110

Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Sitnikov, M. N.; Ситников, Максим Николаевич; Аплеснин, Сергей Степанович; Russian Foundation for Basic Research [12-02-00125-a, 14-02-90010-Bel_a]
}
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13.

    Unexpected impact of magnetic disorder on multiband superconductivity / M. M. Korshunov [et al.] // Phys. Rev. B. - 2014. - Vol. 90, Is. 13, DOI 10.1103/PhysRevB.90.134517. - Cited References: 41. - The authors are grateful to S.-L. Drechsler, P.J. Hirschfeld, K. Kikoin, and S.G. Ovchinnikov for useful discussions. We acknowledge partial support by the Dynasty Foundation and ICFPM (MMK), the Ministry of Education and Science of the Russian Federation (Grant No. 14Y26.31.0007), RFBR (Grant Nos. 12-02-31534 and 13-02-01395), President Grant for Government Support of the Leading Scientific Schools of the Russian Federation (NSh-2886.2014.2), DFG Priority Program 1458, and FP7 EU-Japan program IRON SEA. . - ISSN 1098-0121. - ISSN 1550-235X
   Перевод заглавия: Непредвиденное влияние магнитного беспорядка на многозонную сверхпроводимость

РУБ Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTIVITY
   PARAMAGNETIC IMPURITIES
   IRON
   CONDUCTIVITY
   ALLOYS
Аннотация: We analyze how the magnetic disorder affects the properties of the two-band s± and s++ models, which are the subject of discussions regarding iron-based superconductors and other multiband systems like MgB2. We show that there are several cases when the transition temperature Tc is not fully suppressed by magnetic impurities in contrast to the Abrikosov-Gor'kov theory, but a saturation of Tc takes place in the regime of strong disorder. These cases are: (1) the purely interband impurity scattering and (2) the unitary scattering limit. We show that in the former case the s± gap is preserved, while the s++ state transforms into the s± state with increasing magnetic disorder. For case (2), the gap structure remains intact.

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Leibniz Inst Festkorper & Werkstoffforsch, D-01069 Dresden, Germany
Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands
Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands
Moscow Inst Phys & Technol, Dolgoprudnyi, Russia
Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
Lebedev Phys Inst RAN, Moscow, Russia

Доп.точки доступа:
Korshunov, M. M.; Коршунов, Максим Михайлович; Efremov, D. V.; Golubov, A. A.; Dolgov, O. V.; Dynasty Foundation; ICFPM; Ministry of Education and Science of the Russian Federation [14Y26.31.0007]; RFBR [12-02-31534, 13-02-01395]; Leading Scientific Schools of the Russian Federation [NSh-2886.2014.2]; DFG [1458]; EU-Japan
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14.

Magnetoelectric polarization of paramagnetic HoGa3(BO3)4 single crystals / I. A. Gudim [et al.] // Moscow Int. Symp. on Magnet. (MISM-2014) : Book of abstracts. - 2014. - Ст. 30PO-M-14. - P. 271 . - ISBN 978-5-91978-025-0

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Доп.точки доступа:
Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Temerov, V. L.; Темеров, Владислав Леонидович; Volkov, N. V.; Волков, Никита Валентинович; Moscow International Symposium on Magnetism(6 ; 2014 ; 29 June-3 July ; Moscow); Московский государственный университет им. М.В. Ломоносова
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15.

Magnetic properties of paramagnetic TmAl2,5Sc0,5(BO3)4 single crystals [Текст] / I. A. Gudim [и др.] // First International Workshop Novel Trends in Physics of Ferroics. [[b]]NTPF-2014[[/b]], July 4-6, 2014, St. Petersburg, Russia : Book of abstracts. - 2014. - P267
Аннотация: (TmAl2,5Sc0,5(BO3)4 single crystals were grown from lithium molibdate- and bismuth trimolibdate-based fluxes [1]. These crystals belong to trigonal sp. gr. R32. There lattice parameters are a = 9.293(1) and c = 7.2448(9) and F = 17 %. The magnetic and magnetoelectric properties were measured on a PPMS-9 facility in the temperature range 3?300K and magnetic fields up to 90 kOe. The magnetization of the thulium alumino-scandoborate crystals attains 25000 emu/mol.
Монокристаллы TmAl2,5Sc0,5(BO3)4 были выращены из литий-молибдатного и висмут-тримолибдатного растворов-расплавов [1]. Эти кристаллы принадлежат тригональной пр. гр. R32. Параметры решетки: а = 9,293 (1), с = 7,2448 (9) и Р = 17%. Магнитные и магнитоэлектрические свойства измеряли на установке PPMS-9 в диапазоне температур 3-300K и магнитных полей до 90 кЭ. Намагниченность кристаллов тулиевых алюмо-скандоборатов достигает 25000 единиц / моль.), 2 источника.

Доп.точки доступа:
Gudim, I. A.; Гудим, Ирина Анатольевна; Eremin, E. V.; Еремин, Евгений Владимирович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Temerov, V. L.; Темеров, Владислав Леонидович; Volkov, N. V.; Волков, Никита Валентинович; International Workshop Novel Trends in Physics of Ferroics (1 ; July 4-6 ; St. Petersburg, Russia)
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16.

Fedoseev, A. D.
Partial differential cross section of inelastic magnetic neutron scattering in the paramagnetic phase of LaCoO3 / A. D. Fedoseev // J. Exp. Theor. Phys. - 2014. - Vol. 119, Is. 3. - P. 573-578, DOI 10.1134/S1063776114090027. - Cited References: 18. - This study was supported by the Russian Foundation for Basic Research (project nos. 13-02-00523 A, 14-02-31280 mol_a, and 13-02-98013). . - ISSN 1063-7761. - ISSN 1090-6509

РУБ Physics, Multidisciplinary
Рубрики:
FEATURES
STATE
Аннотация: The partial differential cross section of inelastic magnetic neutron scattering from the compound LaCoO3 in the paramagnetic phase is studied theoretically. The contribution to scattering from the high-spin state of an ion in zero magnetic field and the modification of this contribution upon application of a magnetic field are calculated using the effective Hamiltonian for the 5 D term. The amplitude of the peak in the dependence of the scattering cross section on the energy of scattered neutrons, which corresponds to the transition from the low-spin to the intermediate-spin state, is estimated.

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Публикация на русском языке Федосеев, Александр Дмитриевич. Дважды дифференциальное сечение неупругого магнитного рассеяния нейтронов в парамагнитной фазе LaCoO3 [Текст] / А. Д. Федосеев // Журн. эксперим. и теор. физ. : Наука, 2014. - Т. 146 Вып. 3. - С. 651-656

Доп.точки доступа:
Федосеев, Александр Дмитриевич; Russian Foundation for Basic Research [13-02-00523 A, 14-02-31280 mol_a, 13-02-98013]
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17.

A comparative study of transport properties of composites HTSC+MgTiO3 and HTSC + NiTiO3. The effect of paramagnetic NiTiO3 / M. I. Petrov, D. A. Balaev, K. A. Shaikhutdinov, K. S. Aleksandrov // Physica C-Superconductivity and its Applications. - 2000. - Vol. 341-348, Pt. 3. - P. 1863-1864, DOI 10.1016/S0921-4534(00)01217-X . - ISSN 0921-4534
Кл.слова (ненормированные):
Composite materials -- Copper oxides -- Josephson junction devices -- Magnesium compounds -- Nickel compounds -- Paramagnetism -- Superconductivity -- Thermal effects -- Transport properties -- Yttrium compounds -- Abrikosov vortices flow -- Superconductor insulator superconductor junction -- Thermally activated phase slippage -- High temperature superconductors
Аннотация: Bulk composites Y3/4Lu1/4Ba2Cu3O7+NiTiO3 and Y3/4Lu1/4Ba2Cu3O7+MgTiO3 with insulator volume content 7.5% and 15% modelling a network of Superconductor-Insulator-Superconductor (S-I-S) junctions have been prepared. The ?(T) dependences of composites HTSC+MgTiO3 are described well by the mechanism of Thermally Activated Phase Slippage (TAPS). The anomalous behavior of resistivity ?(T) of HTSC+NiTiO3 composites manifesting as a kink on ?(T) curves at some temperature Tm have been observed. In the temperature range Tm < T < TC the dissipation is Ohmic while below Tm the CVCs are strongly non-linear. This peculiarity is interpreted as arisen owing to Abrikosov vortices flow.

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Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; International conference on materials and mechanisms of superconductivity high temperature superconductors(6 ; 2000 ; Feb. ; 20-25 ; Houston, Texas, USA)
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18.

Mn2+ paramagnetic resonance and structural phase transitions in Rb2CdCl4 / K. S. Aleksandrov [et al.] // Solid State Commun. - 1985. - Vol. 53, Is. 10. - P. 835-839. - Cited References: 18 . - ISSN 0038-1098
Кл.слова (ненормированные):
MAGNETIC RESONANCE -- OPTICAL METHODS -- PARAMAGNETIC RESONANCE -- STRUCTURAL PHASE TRANSITIONS -- CRYSTALS
Аннотация: Structural phase transition in Rb2CdCl4: Mn2+ single crystal has been found near 133 K by EPR, X-ray and optical methods. Octahedral tilt system in the low temperature phase corresponds to the symmetry change D17 4h > D18 2h or D17 4h > C6 2h. В© 1985.

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Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Emelyanova, L. S.; Misjul, S. V.; Мисюль, Сергей Валентинович; Kokov, I. T.
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19.

Ovchinnikov, S. G.
Anisotropic interactions in magnetic crystals with S-state ions. Nanostructures / S. G. Ovchinnikov, V. V. Rudenko // Phys. Usp. - 2014. - Vol. 57, Is. 12. - P. 1180-1198, DOI 10.3367/UFNe.0184.201412b.1299. - Cited References:97. - We are grateful to L M Rudenko, T V Spirina, and N V Veretennikova for the assistance in the preparation of this review. This study was supported in part by the Program of Federal Support for Leading Scientific Schools of the Russian Federation (project No. NSh 1044.2012.2); by the President's Program of Support for Leading Scientific Schools (project No. NSh-2886.2014.2); and by the Russian Foundation for Basic Research (project No. 13-02-00358). . - ISSN 1063. - ISSN 1468-4780. - ISSN

РУБ Physics, Multidisciplinary
Рубрики:
PARAMAGNETIC-RESONANCE
ANTIFERROMAGNETIC-RESONANCE
EXCHANGE
Аннотация: Anisotropy mechanisms in compounds with S-state ions are discussed, including the 'single-ion' exchange mechanism that was developed theoretically by Nikiforov and coworkers based on the two-ion model and which has only recently received detailed experimental study. Results demonstrating the significant role of the 'single-ion' source are presented. An independent generalized method for quantitatively describing and predicting the anisotropy of magnetically ordered crystals is discussed, and its potential for the investigation of the BiFeO3 multiferroic in the region of the existence of a spin cycloid is examined. The anisotropic interactions responsible for the formation of nanostructures in the form of spin vortices (skyrmions) in MnSi and Cu2OSeO3 are analyzed.

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Публикация на русском языке Овчинников, Сергей Геннадьевич. Анизотропные взаимодействия в магнитных кристаллах с ионами в S-состоянии. Наноструктуры [Текст] / С. Г. Овчинников, В. В. Руденко // Успехи физ. наук : Ред. журн. "Успехи физ. наук", 2014. - Т. 184 № 12. - С. 1299-1318

Доп.точки доступа:
Rudenko, V. V.; Руденко, Валерий Васильевич; Овчинников, Сергей Геннадьевич; Program of Federal Support for Leading Scientific Schools of the Russian Federation [NSh 1044.2012.2]; President's Program of Support for Leading Scientific Schools [NSh-2886.2014.2]; Russian Foundation for Basic Research [13-02-00358]
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20.

Lundin, A. A.
Order dependence of the profile of the intensities of multiple-quantum coherences / A. A. Lundin, V. E. Zobov // J. Exp. Theor. Phys. - 2015. - Vol. 120, Is. 5. - P. 762-771, DOI 10.1134/S1063776115040093. - Cited References:62 . - ISSN 1063. - ISSN 1090-6509. -

РУБ Physics, Multidisciplinary
Рубрики:
PARAMAGNETIC SPIN SYSTEMS
   FREE-INDUCTION DECAY
   NMR-SPECTRA
   AUTOCORRELATION FUNCTIONS
   FLUCTUATION SPECTRUM
   TEMPERATURE DYNAMICS
   LINE-SHAPE
   SOLIDS
   IRREVERSIBILITY
   BEHAVIOR
Аннотация: A modification of the widespread phenomenological model theory of multiple-quantum (MQ) nuclear magnetic resonance spectra of a single cluster of correlated spins has been developed. In contrast to the mentioned theory, the size distribution of such clusters has been consistently taken into account. To obtain the distribution, solutions for the amplitudes of the expansion in the complete set of orthogonal operators are used. Expressions specifying the dependence of the profile of the intensities of MQ coherences on their number n (order) have been obtained. The total form of the dependence has been evaluated by means of the numerical implementation of the resulting expressions. The asymptotic expressions for large n values (wings of the spectrum) have been obtained analytically by the saddle-point method. It has been shown that the dependence under study has a Gaussian central part and exponential wings. The results obtained are in agreement with the previous calculations for some model systems and existing experimental data.

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Публикация на русском языке Лундин, Андрей Арнольдович. Зависимость профиля интенсивностей многоквантовых когерентностей от порядков [Текст] / А. А. Лундин, В. Е. Зобов // Журн. эксперим. и теор. физ. : Наука, 2015. - Т. 147 Вып. 5. - С. 885-895

Держатели документа:
Russian Acad Sci, Semenov Inst Chem Phys, Moscow 117977, Russia.
Russian Acad Sci, Akademgorodok, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Zobov, V. E.; Зобов, Владимир Евгеньевич
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