Библиотека института физики им. Л.В. Киренского СО РАН

Главная

Базы данных

Труды сотрудников ИФ СО РАН - результаты поиска

Вид поиска

Каталог книг и брошюр библиотеки ИФ СО РАН

Каталог журналов библиотеки ИФ СО РАН

Труды сотрудников ИФ СО РАН

Область поиска

в найденном

Найдено в других БД:

Каталог книг и брошюр библиотеки ИФ СО РАН (4)

Формат представления найденных документов:
полный	информационный	краткий

Отсортировать найденные документы по:
автору	заглавию	году издания	типу документа

Поисковый запрос: (<.>K=Impurity<.>)

Общее количество найденных документов : 54
Показаны документы с 1 по 10

1-10 11-20 21-30 31-40 41-50 51-54

The generalized method of quantitative description of the uniaxial anisotropy in weak ferromagnet rhombohedral calcite type structure crystals with S-state ions / G. V. Bondarenko [et al.] // J. Magn. Magn. Mater. - 2013. - Vol. 335. - P. 90-96, DOI 10.1016/j.jmmm.2013.01.037. - Cited References: 35 . - ISSN 0304-8853
Кл.слова (ненормированные):
Weak ferromagnetism -- Magnetic anisotropy -- Impurity
Аннотация: The method for investigation of the uniaxial and hexagonal anisotropies in weakly ferromagnetic rhombohedral FeBO3 crystals with the Fe2þ magnetic impurity with the use of the single-ion and pair approximation has been developed. In the framework of this method, a quantitative discrepancy between theoretical and experimental data on a uniaxial ﬁeld has been eliminated. The energy contributions to the hexagonal anisotropy that are caused by the Dzyaloshinsky–Moriya interaction, the crystal ﬁeld of Fe3þ ions and the temperature dependence of this anisotropy were analytically treated. The experimental temperature dependence of the hexagonal anisotropy of FeBO3 crystals is explained. It is shown that the compensation point and the typical temperature dependence of the hexagonal anisotropy result from the competition of the contributions of Fe3þ and Fe2þ ions. It is shown that respective considerable contributions to the anisotropy of Fe3þ and Fe2þ ions are made by the cubic symmetry and the uniaxial symmetry of the exchange ‘‘single-ion’’ type. The anisotropy constants for FeBO3 crystal was obtained by using the described results. It was shown, that for the calcite type structure crystals (iron borate and manganese carbonate) with S-state ions, the single ion and pair models (which previously raised doubts in their validity and accuracy) describe the experimental data good enough.

Смотреть статью,
WOS,
Читать в сети ИФ
Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Bondarenko, G. V.; Бондаренко, Геннадий Васильевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Rudenko, V. V.; Руденко, Валерий Васильевич; Sosnin, V. M.; Соснин, Виктор Михайлович; Tugarinov, V. I.; Тугаринов, Василий Иванович; Vorotynov, A. M.; Воротынов, Александр Михайлович
}
Найти похожие

Вальков, Валерий Владимирович.
Эффект Фано при туннелировании спин-поляризованного электрона через одиночную магнитную примесь / В. В. Вальков, С. В. Аксенов, Е. А. Уланов // Физ. низких температур. - 2013. - Т. 39, Вып. 1. - С. 48-52

Смотреть статью,
WOS

Переводная версия Val'kov, V. V. Fano effect upon tunneling of a spin-polarized electron through a single magnetic impurity / V.V. Val'kov // Low Temperature Physics / Физика низких температур . - 2013. - Vol. 39, no. 1. - P.35-38

Держатели документа:
Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Аксенов, Сергей Владимирович; Aksenov, S. V.; Уланов, Е. А.; Val'kov, V. V.
}
Найти похожие

    Val'kov, V. V.
    Fano effect upon tunneling of a spin-polarized electron through a single magnetic impurity / V.V. Val'kov, S. V. Aksenov, E. A. Ulanov // Low Temp. Phys. - 2013. - Vol. 39, no. 1. - P. 35-38 ; Физика низких температурDOI 10.1063/1.4775746
   Перевод заглавия: Эффект Фано при туннелировании спин-поляризованного электрона через одиночную магнитную примесь
Аннотация: The calculations of transport characteristics of a single magnetic impurity showed that the presence of different effective channels for electron transmission results in the Fano effect. It was noticed that the external magnetic field and gate voltage allow controlling the conducting properties, which are governed by the configuration interaction between the states of the system

Смотреть статью

Доп.точки доступа:
Aksenov, S. V.; Аксенов, Сергей Владимирович; Ulanov, E. A.; Вальков, Валерий Владимирович

}
Найти похожие

    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.

Scopus,
WOS,
Читать в сети ИФ
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.
}
Найти похожие

    Val'kov, V. V.
    Effect of multiple scattering on the quantum transport of electrons through a magnetic impurity with a single-ion anisotropy : abstract / V. V. Val'kov, S. V. Aksenov, E. A. Ulanov // Spin Waves 2013, Int. Symp. : Program. Abstracts. - СПб., 2013. - P. 75 . - ISBN 978-5-91918-334-1
   Перевод заглавия: Влияние многократного рассеяния на квантовый транспорт электронов через магнитную примесь с одноионной анизотропией

Материалы конференции

Доп.точки доступа:
Aksenov, S. V.; Аксенов, Сергей Владимирович; Ulanov, E. A.; Вальков, Валерий Владимирович; Российская академия наук; Физико-технический институт им. А.Ф. Иоффе РАН; "Spin Waves", International Symposium (2013 ; июнь ; 9-15 ; Санкт-Петербург)
}
Найти похожие

    Val'kov, V. V.
    Effect of multiple scattering on the quantum transport of electrons through a magnetic impurity with a single-ion anisotropy : abstract / V. V. Val'kov, S. V. Aksenov, E. A. Ulanov ; Taurida National V. I. Vernadsky University // Functional materials : Abstracts / ed. V. N. Berzhansky. - Simferopol, 2013. - Ст. BP2-1P/2. - P. . - ISBN 978-966-491-465-6
   Перевод заглавия: Влияние многократного рассеяния на квантовый транспорт электронов через магнитную примесь с одноионной анизотропией

Материалы конференции

Доп.точки доступа:
Berzhansky, V. N. \ed.\; Бержанский, Владимир Наумович; Aksenov, S. V.; Аксенов, Сергей Владимирович; Ulanov, E. A.; Вальков, Валерий Владимирович; Taurida National V. I. Vernadsky University; "Functional Materials", International Conference(2013 ; 29 Sept.-5 Oct. ; Partenit, Yalta; Ukraine Crimea)
}
Найти похожие

Multiband model for the dynamical conductivity of superconducting pnictides manifestation of impurity induced s±às++ transition / D. V. Efremov [et al.] // International conferences «Phase separation and Superstripes in High Temperature Superconductors and Related Materials (Superstripes-2012)». - 2012. - P. 127
Аннотация: The multiband (4 x4 bands) model and its reduction to the effective two-band model taking into account the strong interaction with intermediate spin-fluctuations have been successively applied to the description of the properties of Ba1-xKxFeAs2. On the base of this approach and using the extension of the formalism developed for the multiband system MgB2 we have calculated free energy and frequency dependent optical complex conductivity \ sigma ( \omega ,T) in the superconducting as well as the normal states of pnictides. An application of the presented approach to the ellipsometry data for single crystals of Ba1-xKxFeAs2 allows to describe some experimental features connected to multigap nature and strong coupling effects. Effects of rather strong nonmagnetic impurities beyond the Born approximation which can lead to the transitions in the superconducting order parameter S+- - S++ were investigated.

Программа конференции

Доп.точки доступа:
Efremov, D. V.; Korshunov, M. M.; Коршунов, Максим Михайлович; Golubov, A. A.; Dolgov, O. V.; Ettore Majorana Foundation, Centre for Scientific Culture; Rome International Center for Materials Science; International School of Solid State Physics; "Phase separation and Superstripes in High Temperature Superconductors and Related Materials", Int. Conf. (55 ; 2012 ; July ; 11-17 ; Erice (Sicily), Italy)
}
Найти похожие

Formation of ferromagnetic germanides by solid-state reactions in 20Ge/80Mn films / V. G. Myagkov [et al.] // Thin Solid Films. - 2014. - Vol. 552. - P. 86-91, DOI 10.1016/j.tsf.2013.12.029. - Cited References: 53 . - ISSN 0040-6090

РУБ Materials Science, Multidisciplinary + Materials Science, Coatings & Films + Physics, Applied + Physics, Condensed Matter
Рубрики:
PHASE-FORMATION
   MAGNETIC-PROPERTIES
   Mn5Ge3 FILMS
   X-RAY
   Ge(111)
   TRANSFORMATIONS
   DIFFUSION
   SPECTRA
   SYSTEM
   LAYERS
Кл.слова (ненормированные):
Manganite-germanium -- Solid state reaction -- First phase -- Mn5Ge3 alloy -- Carbon impurity -- Oxygen impurity -- Annealing -- Magnetic anisotropy
Аннотация: Solid state reactions between Ge and Mn films are systematically examined using X-ray diffraction, photoelectron spectroscopy, and magnetic and electrical measurements. The films have a nominal atomic ratio Ge:Mn = 20:80 and are investigated at temperatures from 50 to 500 °C. It is established that after annealing at ~ 120°C, the ferromagnetic Mn5Ge3 phase is the first phase to form at the 20Ge/80Mn interface. As the annealing temperature increases to 300°C, the weak magnetic Mn5Ge 2 + Mn3Ge phases simultaneously begin to grow and they become dominant at 400°C. Increasing the annealing temperature to 500°C leads to the formation of the ferromagnetic phase with a Curie temperature TC ~ 350-360 K and magnetization 14-25 kA/m at room temperature. The X-ray diffraction study of the samples shows the reflections from the Mn 5Ge3 phase, and the photoelectron spectra contain the oxygen and carbon peaks. The homogeneous distribution of oxygen and carbon over the sample thickness suggests that the increased Curie temperature and magnetization are related to the migration of C and O atoms into the Mn 5Ge3 lattice and the formation of the Nowotny phase Mn5Ge3CxOy. The initiation temperature (~ 120 C) is the same in the Mn5Ge3 phase with the solid-state reactions in the Ge/Mn films as well as in the phase separation in the GexMn1 - x diluted semiconductors. Thus, we conclude that the synthesis of the Mn5Ge3 phase is the moving force for the spinodal decomposition of the GexMn 1 - x diluted semiconductors.

Смотреть статью,
Scopus,
WoS,
WOS,
Читать в сети ИФ
Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Russian Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk 660049, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Myagkov, V. G.; Мягков, Виктор Григорьевич; Zhigalov, V. S.; Жигалов, Виктор Степанович; Matsynin, A. A.; Мацынин, Алексей Александрович; Bykova, L. E.; Быкова, Людмила Евгеньевна; Mikhlin, Y. L.; Bondarenko, G. N.; Бондаренко, Галина Николаевна; Patrin, G. S.; Патрин, Геннадий Семёнович; Yurkin, G. Yu.; Юркин, Глеб Юрьевич
}
Найти похожие

Val'kov, V. V.
Effect of pressure on antiferromagnetic and superconducting ordering in systems with heavy fermions / V. V. Val'kov, A. O. Zlotnikov // Bull. Russ. Acad. Sci.: Phys. - 2012. - Vol. 76, Is. 7. - P. 733-736, DOI 10.3103/S1062873812070362. - Cited References: 7. - This work was supported by the Department of Physical Sciences, Russian Academy of Sciences (the Strong Electron Correlations Program); the Russian Foundation for Basic Research, projects nos. 100200251 and 110200741; the RFBR Sibir’, project no. 110298007; and by the federal target program Scientific and Pedagogical Personnel of an Innovative Russia, 2009–2013. . - ISSN 0022-2860
Кл.слова (ненормированные):
Antiferromagnetic orderings -- Antiferromagnetic orders -- Antiferromagnetic phasis -- Antiferromagnetics -- Cooper instability -- Effect of pressure -- External pressures -- Heavy fermion -- Impurity level -- Localized state -- Periodic Anderson model -- Seed energy -- Spin moments -- Superconducting ordering -- Superexchange interaction -- Superconductivity -- Antiferromagnetism
Аннотация: Characteristics of the superconducting and antiferromagnetic phases of heavy-fermion intermet-allides are described within a periodic Anderson model with allowance for the superexchange interaction between spin moments of the localized states. It is shown that an external pressure that changes the seed energy of an impurity level can rapidly destroy the long-range antiferromagnetic order. The development of the Cooper instability near such an order-disorder transition induces the experimentally observed state in which superconductivity coexists with the antiferromagnetic ordering. В© 2012 Allerton Press, Inc.

Смотреть статью,
Scopus,
Читать в сети ИФ

Публикация на русском языке Вальков, Валерий Владимирович. Влияние давления на антиферромагнитное и сверхпроводящее упорядочение в системах с тяжелыми фермионами [Текст] / В. В. Вальков, A. O. Злотников // Изв. РАН. Сер. физич. - 2012. - Т. 76 № 7. - С. 821-824

Доп.точки доступа:
Zlotnikov, A. O.; Злотников, Антон Олегович; Вальков, Валерий Владимирович; International Interdisciplinary Symposium “Ordering in Minerals and Alloys” (14th ; 8 -13 Sept. 2011 ; Rostov-on-Don)
}
Найти похожие

10.

Zhandun, V. S.
Effect of an Eu3+ impurity on the antiferrodistortion and ferroelectric instabilities in an EuTiO3 bulk crystal and thin films / V. S. Zhandun, N. G. Zamkova, V. I. Zinenko // J. Exp. Theor. Phys. - 2015. - Vol. 120, Is. 1. - P. 103-109, DOI 10.1134/S1063776115010070. - Cited References:21. - This work was supported by the Russian Foundation for Basic Research (project no. 12-02-00025-a) and the program Leading Scientific Schools of the President of the Russian Federation (project no. NSh-924.2014.2). . - ISSN 1063. - ISSN 1090-6509. -

РУБ Physics, Multidisciplinary
Рубрики:
PEROVSKITES
Аннотация: The existence of an antiferrodistortion transition in EuTiO3 is disputable, and this question needs to be answered. One of the possible causes is the presence of an Eu3+ impurity in a sample. A nonempirical polarizable ion model is used to study the effect of a trivalent Eu3+ ion impurity on the antiferrodistortion and ferroelectric instabilities of an EuTiO3 crystal in the bulk and the thin-film states. Lattice dynamics calculation shows that a bulk impurity-free EuTiO3 crystal has no unstable modes throughout the entire phase space volume. The addition of an Eu3+ impurity leads to a significant softening of the rotational mode, the distortion in which makes tetragonal phase I4/mcm (which is experimentally observed) energetically favorable. In going from the bulk crystal to the thin film, the vibration spectrum of the impurity-free film has unstable antiferrodistortion and rotational modes. The addition of an Eu3+ impurity enhances the antiferrodistortion instability, which fully or partly suppresses ferroelectricity.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ

Публикация на русском языке Жандун, Вячеслав Сергеевич. Влияние примеси Eu3+ на антиферродисторсионную и сегнетоэлектрическую неустойчивости в объемном кристалле и тонких пленках EuTiO3 [Текст] / В. С. Жандун, Н. Г. Замкова, В. И. Зиненко // J. Exp. Theor. Phys. : Наука, 2015. - Т. 147 Вып. 1. - С. 119-126

Доп.точки доступа:
Zamkova, N. G.; Замкова, Наталья Геннадьевна; Zinenko, V. I.; Зиненко, Виктор Иванович; Жандун, Вячеслав Сергеевич; Russian Foundation for Basic Research [12-02-00025-a]; Russian Federation [NSh-924.2014.2]
}
Найти похожие