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Каталог книг и брошюр библиотеки ИФ СО РАН

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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Myagkov V. G., Zhigalov V. S., Matsynin A. A., Bykova L. E., Mikhlin Y. L., Bondarenko G. N., Patrin G. S., Yurkin G. Yu.
Заглавие : Formation of ferromagnetic germanides by solid-state reactions in 20Ge/80Mn films
Место публикации : Thin Solid Films: Elsevier Science, 2014. - Vol. 552. - P.86-91. - ISSN 0040-6090, DOI 10.1016/j.tsf.2013.12.029
Примечания : Cited References: 53
Предметные рубрики: PHASE-FORMATION
MAGNETIC-PROPERTIES
Mn5Ge3 FILMS
X-RAY
Ge(111)
TRANSFORMATIONS
DIFFUSION
SPECTRA
SYSTEM
LAYERS
Ключевые слова (''Своб.индексиров.''): 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.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuzubov A. A., Anan'eva Y. E., Fedorov A. S., Tomilin F. N., Krasnov P. O.
Заглавие : Quantum-chemical calculations on the stability and mobility of vacancies in graphene
Место публикации : Russ. J. Phys. Chem. A: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 86, Is. 7. - P.1088-1090. - ISSN 0036-0244, DOI 10.1134/S0036024412070126
Примечания : Cited References: 18
Предметные рубрики: INITIO MOLECULAR-DYNAMICS
TRANSITION
POINTS
METALS
LAYERS
Ключевые слова (''Своб.индексиров.''): graphene--defects--quantum-chemical simulation--deformations
Аннотация: Thermodynamic stabilities of mono- and bivacancies in graphene for deformed and nondeformed lattices are estimated by means of quantum-chemical calculations. Monovacancy hopping constants are evaluated in dependence on the applied uniaxial deformations.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kosyrev N. N., Shvets V. A., Mikhailov N. N., Varnakov S. N., Ovchinnikov S. G., Rykhlitskii S. V., Yakovlev I. A.
Заглавие : Ellipsometric technique for determining in situ the absorption coefficient of semiconducting nanolayers
Коллективы : Ministry of Education and Science of the Russian Federation [14.513.11.0016, 14.132.21.1709, 14.V37.21.1276]; Program Supporting Leading Scientific Schools [NSh-1044.2012.2]; Russian Foundation for Basic Research [13-02-01265]; Physics Division, Russian Academy of Sciences [2.4.1]; Presidium of the Russian Academy of Sciences [23.34]; Siberian-Far East Branches, Russian Academy of Sciences [85]; Siberian Branch, Russian Academy of Sciences [38]
Место публикации : Tech. Phys.: MAIK Nauka-Interperiodica / Springer, 2014. - Vol. 59, Is. 5. - P.736-739. - ISSN 1063-7842, DOI 10.1134/S1063784214050144. - ISSN 1090-6525
Примечания : Cited References: 17. - This work was supported financially by the Ministry of Education and Science of the Russian Federation (state contract no. 14.513.11.0016, agreement nos. 14.132.21.1709 and 14.V37.21.1276), the Program Supporting Leading Scientific Schools (project no. NSh-1044.2012.2), Russian Foundation for Basic Research (project no. 13-02-01265), Physics Division, Russian Academy of Sciences (program no. 2.4.1), Presidium of the Russian Academy of Sciences (program no. 23.34), Siberian-Far East Branches, Russian Academy of Sciences (project no. 85), and integration project no. 38 of the Siberian Branch, Russian Academy of Sciences.
Предметные рубрики: LAYERS
Аннотация: An algorithm that makes it possible to solve the inverse problem of ellipsometry aimed at determining the absorption coefficient on the basis of a single-zone ellipsometric experiment during the growth of thin semiconducting films is developed and implemented. The technique is based on analysis of the variation of ellipsometric parameters I and Delta directly during the growth. The algorithm is tested in synthesis of Si/SiO2/Si(100) and Hg1 - x Cd (x) Te structures.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sandalov I. S., Zamkova N. G., Zhandun V. S., Tarasov I. A., Varnakov S. N., Yakovlev I. A., Solovyov L. A., Ovchinnikov S. G.
Заглавие : Effect of electron correlations on the Fe3Si and α- FeSi2 band structure and optical properties
Коллективы : Russian Fund of Basic Research [14002-00186, 13-02-01265]; President of Russia Grants [2886.2014.2, 924.2014.2]
Место публикации : Phys. Rev. B: American Physical Society, 2015. - Vol. 92, Is. 20. - Ст.205129. - ISSN 1098-0121, DOI 10.1103/PhysRevB.92.205129. - ISSN 1550-235X(eISSN)
Примечания : Cited References:69. - The theoretical part of this work was supported by Russian Fund of Basic Research, Grant No. 14002-00186 and the President of Russia Grants No. 2886.2014.2 and No. 924.2014.2 for support of Leading Scientific School. The calculations were performed with the computer resources of NRC "Kurchatov Institute" (ui2.computing.kiae.ru). The experimental work was supported by Russian Fund of Basic Research, Grant No. 13-02-01265. I.S. thanks A. Ruban for useful discussion.
Предметные рубрики: DENSITY-FUNCTIONAL THEORY
TOTAL-ENERGY CALCULATIONS
AUGMENTED-WAVE METHOD
BASIS-SET
METALS
ABSORPTION
EMISSION
SURFACES
ALLOYS
LAYERS
Аннотация: We use the Vienna ab initio simulation package (vasp) for evaluation of the quasiparticle spectra and their spectral weights within Hedin's GW approximation (GWA) for Fe3Si and α-FeSi2 within the non-self-consistent one-shot approximation G0W0 and self-consistent scGWA with the vertex corrections in the particle-hole channel, taken in the form of two-point kernel. As input for G0W0, the band structure and wave functions evaluated within the generalized gradient corrected local-density approximation to density functional theory (GGA) have been used. The spectral weights of quasiparticles in these compounds deviate from unity everywhere and show nonmonotonic behavior in those parts of bands where the delocalized states contribute to their formation. The G0W0 and scGWA spectral weights are the same within 2%–5%. The scGWA shows a general tendency to return G0W0 bands to their GGA positions for the delocalized states, while in the flat bands it flattens even more. Variable angle spectroscopic ellipsometry measurements at T=296 K on grown single-crystalline ∼50-nm-thick films of Fe3Si on n-Si(111) wafer have been performed in the interval of energies ω∼(1.3–5) eV. The comparison of G0W0 and scGW theory with experimental real and imaginary parts of permittivity, refractive index, extinction and absorption coefficients, reflectivity, and electron energy loss function shows that both G0W0 and scGW qualitatively describe experiment correctly, the position of the low-energy peaks is described better by the scGW theory, however, its detailed structure is not observed in the experimental curves. We suggest that the angle-resolved photoemission spectroscopy experiments, which can reveal the fine details of the quasiparticle band structure and spectral weights, could help to understand (i) if the scGWA with this type of vertex correction is sufficiently good for description of these iron silicides and, possibly, (ii) why some features of calculated permittivity are not seen in optical experiments.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Patrin G. S., Kobyakov A. V., Turpanov I. A., Patrin K. G., Rautskii M. V.
Заглавие : Magnetoresonance properties of three-layer Co/Ge/Co films
Коллективы : Russian Federation for Basic Research [14-02-00238-a]
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2016. - Vol. 58, Is. 5. - P.1034-1040. - ISSN 1063-7834, DOI 10.1134/S1063783416050206. - ISSN 1090-6460(eISSN)
Примечания : Cited References:20. - This study was performed in the framework of the State Task of the Ministry of Education and Science of the Russian Federation to the Siberian Federal University (task no. 3.2534.2014/K) and was supported by the Russian Federation for Basic Research (project no. 14-02-00238-a).
Предметные рубрики: Magnetic-properties
Multilayers
Spacer
Layers
Аннотация: Three-layer Co/Ge/Co films have been studied using electron magnetic resonance. It has been established that the resonance spectrum of the film is a superposition of two Lorentzian lines. It has been found that the anisotropy induced at the cobaltaEuro'germanium interface makes the main contribution to the resonance spectrum and determines its features. The temperature dependences of the anisotropy field and the parameters of the interlayer exchange have been measured. The interlayer interactions exhibit an antiferromagnetic character and have been explained in terms of a model similar to the description of superexchange in magnetic dielectrics.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Song Y. Y., Kim D. H., Yu S. C., Kim P. D., Turpanov I. A., Lee L. A., Buzmakov A. E., Lee K. W.
Заглавие : Observation of nonmonotonic oscillatory interlayer exchange coupling in Co/Cu/CoO films with varying Cu spacer thickness
Разночтения заглавия :авие SCOPUS: Observation of nonmonotonic oscillatory interlayer exchange coupling in CoCuCoO films with varying Cu spacer thickness
Место публикации : J. Appl. Phys.: AMER INST PHYSICS, 2008. - Vol. 103: 52nd Annual Conference on Magnetism and Magnetic Materials (NOV 05-09, 2007, Tampa, FL), Is. 7. - Ст.07C112. - ISSN 0021-8979, DOI 10.1063/1.2831390
Примечания : Cited References: 20
Предметные рубрики: GIANT MAGNETORESISTANCE
MAGNETIC-ANISOTROPY
LAYERS
BIAS
SUPERLATTICES
MULTILAYERS
TRILAYERS
Ключевые слова (''Своб.индексиров.''): copper--film thickness--thermal effects--cocucoo films--oscillatory interlayer exchange coupling.--metallic films
Аннотация: We report our experimental observation of interlayer exchange coupling phenomena in CoO/Cu/Co trilayers with systematic variation of Cu spacer layer thickness as well as temperature. It has been found that there exists a clear indication of nonmonotonically varying oscillatory interlayer exchange coupling. The amplitude of oscillation increases, reaches to the maximum, and decreases with increasing Cu spacer thickness from 1 to 16 atomic layers for all temperature ranges between 70 and 200 K. (c) 2008 American Institute of Physics.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Seredkin V. A., Stolyar S. V., Frolov G. I., Yakovchuk V. Y.
Заглавие : Thermomagnetic data writing and erasing in DyCo/NiFe (TbFe/NiFe) film structures
Место публикации : Tech. Phys. Lett.: AMER INST PHYSICS, 2004. - Vol. 30, Is. 10. - P820-822. - ISSN 1063-7850, DOI 10.1134/1.1813720
Примечания : Cited References: 10
Предметные рубрики: SPIN-WAVE RESONANCE
ANISOTROPY
LAYERS
Аннотация: A new principle of data writing and erasing is proposed based on the exchange coupling between magnetic layers with mutually orthogonal orientations of the effective magnetization. The new method provides for a significant decrease in energy consumption. The possibility of using bilayer magnetic films of the (rare earth metal-transition metal)/NiFe type possessing unidirectional anisotropy as the media for thermomagnetic writing and erasing of magnetooptical data is studied. (C) 2004 MAIK "Nauka / Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mahesh R., Sander D., Zharkov S. M., Kirschner J.
Заглавие : Stress and growth of Ag monolayers on a Fe(100) whisker
Место публикации : Phys. Rev. B: AMERICAN PHYSICAL SOC, 2003. - Vol. 68, Is. 4. - Ст.45416. - ISSN 1098-0121, DOI 10.1103/PhysRevB.68.045416
Примечания : Cited References: 42
Предметные 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Patrin G. S., Volkov N. V., Kononov V. P.
Заглавие : Effect of optical radiation on magnetic resonance in Fe/Si/Fe trilayer films
Место публикации : JETP Letters. - 1998. - Vol. 68, Is. 4. - P.307-311. - ISSN 0021-3640, DOI 10.1134/1.567864
Примечания : Cited References: 9
Предметные рубрики: LAYERS
Аннотация: A photoinduced change in the magnetic resonance parameters is observed in trilayer films of the system Fe/Si/Fe. The shifts of the resonance field and the character of the interlayer interaction are investigated as functions of the temperature, illumination of the films, and thickness of the silicon interlayer. It is found that at low temperatures the photoinduced contribution to the exchange interaction constant between the iron layers is antiferromagnetic. (C) 1998 American Institute of Physics. [S0021-3640(98)00716-6].
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vazhenina I. G., Iskhakov R. S., Chekanova L. A.
Заглавие : Spin-wave resonance in chemically deposited Fe-Ni films: measuring the spin-wave stiffness and surface anisotropy constant
Коллективы : Russian Foundation for Basic Research [16-03-00256, 16-03-00969]
Место публикации : Phys. Solid State. - 2018. - Vol. 60, Is. 2. - P.292-298. - ISSN 1063-7834, DOI 10.1134/S1063783418020294. - ISSN 1090-6460(eISSN)
Примечания : Cited References:39. - This study was supported by the Russian Foundation for Basic Research, projects nos. 16-03-00256 and 16-03-00969.
Предметные рубрики: FERROMAGNETIC-RESONANCE
FERRIHYDRITE NANOPARTICLES
LAYERS
Аннотация: Single-layer Fe x Ni1 - x thin magnetic films have been investigated by the spin-wave resonance technique in the entire concentration range. The surface anisotropy and exchange stiffness constants for the films with a Ni content from 30 to 80 at % have been measured from the experimental standing spin wave spectra. The surface exchange spin wave penetration depth δ C = 20–30 nm has been determined from the dependences of the surface anisotropy and exchange coupling constants on the Fe20Ni80 film thickness in the range of 250–400 nm.
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