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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Komogortsev S. V., Patrusheva T. N., Balaev D. A., Denisova E. A., Ponomarenko I. V.
Заглавие : Cobalt ferrite nanoparticles in a mesoporous silicon dioxide matrix
Коллективы : Development of the Scientific Potential of Higher Education [RNP. 2.1.1/2584]; Krasnoyarsk Regional Science Foundation; Russian Foundation for Basic Research [r-Enisei-a 03-07-96803, 09-02-98002-r_sibir'_a]
Место публикации : Tech. Phys. Lett. - 2009. - Vol. 35, Is. 10. - P.882-884. - ISSN 1063-7850, DOI 10.1134/S1063785009100022
Примечания : Cited References: 10. - This study was supported in part by the Federal Program "Development of the Scientific Potential of Higher Education" (project no. RNP. 2.1.1/2584) and jointly by the Krasnoyarsk Regional Science Foundation and the Russian Foundation for Basic Research (project nos. r-Enisei-a 03-07-96803 and 09-02-98002-r_sibir'_a).
Предметные рубрики: MAGNETIC-PROPERTIES
NANOSIZED COFE2O4
ANISOTROPY
POWDERS
CURVES
Аннотация: We have studied magnetic nanoparticles of cobalt ferrite obtained by the extraction-pyrolysis method in a mesoporous silicon dioxide (MSM-41) molecular sieve matrix. The X-ray diffraction data show evidence for the formation of CoFe(2)O(4) particles with a coherent scattering domain size of similar to 40 nm. Measurements of the magnetization curves showed that powders consisting of these nanoparticles are magnetically hard materials with a coercive field of H (c)(4.2 K) = 9.0 kOe and H (c)(300 K) = 1.8 kOe and a reduced remanent magnetization of M (r)/M (s)(4.2 K) = 0.83 and M (r)/M (s)(300 K) = 0.49. The shape of the low-temperature (4.2 K) magnetization curves is adequately described in terms of the Stoner-Wohlfarth model for randomly oriented single-domain particles with a cubic magnetic anisotropy.
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ignatchenko V. A., Mankov Yu. I.
Заглавие : The effect of correlation-properties of inhomogeneities on plasma excitations in a metal
Разночтения заглавия :авие SCOPUS: The effect of correlation properties of inhomogeneities on plasma excitations in a metal
Место публикации : J. Phys.: Condens. Matter: IOP PUBLISHING LTD, 1991. - Vol. 3, Is. 31. - P.5837-5845. - ISSN 0953-8984, DOI 10.1088/0953-8984/3/31/007
Примечания : Cited References: 21
Предметные рубрики: SPIN-WAVES
ANISOTROPY
Аннотация: We theoretically investigate the manifestations of the non-monotonic character and anisotropic peculiarities of the correlation functions of the inhomogeneities in the dispersion law and damping of plasma waves. The following specific effects have been found: a change in the character of the modifications, dispersion law and damping for small wavenumbers; dependence of the plasma frequency shift on the direction of the wave propagation. We substantiate possibilities for developing the correlation spectroscopy of plasma waves which would enable us not only to measure a correlation radius of the inhomogeneities (this has been suggested earlier), but also to obtain information in the form of the correlation function.
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3.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lepeshev A. A., Iskhakov R. S., Denisova E. A., Saunin V. N.
Заглавие : Plasma-spraying Co-Ni-Fe-B-Si amorphous alloys. Structure and magnetic properties
Место публикации : Pisma Zhurnal Tek. Fiz.: MEZHDUNARODNAYA KNIGA, 1995. - Vol. 21, Is. 16. - P.22-26. - ISSN 0320-0116
Примечания : Cited References: 8
Предметные рубрики: ANISOTROPY
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4.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ivanov A. A., Orlov V. A.
Заглавие : Self-organization of the magnetization in ferromagnetic nanowires
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН , RFBR [14-02-00238-a]
Место публикации : J. Magn. Magn. Mater.: Elsevier Science, 2017. - Vol. 440. - P.217-220. - ISSN 0304-8853, DOI 10.1016/j.jmmm.2016.12.053. - ISSN 1873-4766(eISSN)
Примечания : Cited References:21. - This study was supported by RFBR, Project no. 14-02-00238-a
Предметные рубрики: SYSTEM
ANISOTROPY
Ключевые слова (''Своб.индексиров.''): domain wall--nanowire--magnetic inhomogeneities--stochastic domains
Аннотация: In this work we demonstrate the occurrence of the characteristic spatial scale in the distribution of magnetization unrelated to the domain wall or crystallite size with using computer simulation of magnetization in a polycrystalline ferromagnetic nanowire. This is the stochastic domain size. We show that this length is included in the spectral density of the pinning force of domain wall on inhomogeneities of the crystallographic anisotropy. The constant and distribution of easy axes directions of the effective anisotropy of stochastic domain, are analytically calculated.
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5.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mankov Y. I.
Заглавие : Effect of surface fixing of remagnetization on magnetoresistance of thin ferromagnetic layers
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1994. - Vol. 36, Is. 12. - P3634-3637. - ISSN 0367-3294
Примечания : Cited References: 8
Предметные рубрики: ANISOTROPY
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6.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Iskhakov R. S., Seredkin V. A., Stolyar S. V., Frolov G. I., Yakovchuk V. Y.
Заглавие : Effects of exchange interaction in bilayer DyxCo1-x/NiFe films in the vicinity of compensation compositions of amorphous DyCo alloys
Разночтения заглавия :авие SCOPUS: Effects of exchange interaction in bilayer DyxCo1 - X/NiFe films in the vicinity of compensation compositions of amorphous DyCo alloys
Место публикации : JETP Letters. - 2004. - Vol. 80, Is. 10. - P.638-641. - ISSN 0021-3640, DOI 10.1134/1.1857270
Примечания : Cited References: 12
Предметные рубрики: SPIN-WAVE RESONANCE
ANISOTROPY
Аннотация: The displacement field of the hysteresis loop due to exchange anisotropy in planar DyCo/NiFe systems is studied experimentally as a function of the concentration of the rare-earth element. The bilayer DyCo/NiFe film system is characterized by an orthogonal arrangement of the effective magnetizations of separate layers under the condition that the amorphous DyCo layer is prepared in the region of magnetic compensation. An analysis of the dependence of the displacement field on the Dy concentration has led to an understanding of the physical mechanism of the formation of the exchange anisotropy in these planar systems. (C) 2004 MAIK "Nauka/Interperiodica".
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7.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Frolov G. I., Seredkin V. A., Yakovchuk V. Y.
Заглавие : Studying the mechanism of exchange coupling in ferro/ferrimagnet NiFe/DyCo film structures
Коллективы :
Место публикации : Tech. Phys. Lett.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2010. - Vol. 36, Is. 1. - P57-59. - ISSN 1063-7850, DOI 10.1134/S1063785010010189
Примечания : Cited References: 7. - This study was supported in part by the Program for Development of the Scientific Potential of Russian Universities (project no. RNP.2.1.1/4399).
Предметные рубрики: ANISOTROPY
Аннотация: Dependence of the magnetic and magnetooptical properties of an exchange-coupled NiFe/DyCo bilayer system on the thickness (t (DyCo)) of a magnetically hard layer has been studied. It is established that the unidirectional anisotropy vanishes at t (DyCo) similar to 400 , while the coercive field in the magnetically soft layer becomes comparable to the exchange-induced field shift. In this case, the DyCo layer magnetization is almost parallel to the film plane, whereas a reference DyCo film exhibits a perpendicular anisotropy. A model of the magnetic state of layers in the ferro/ferrimagnetic layer structure under consideration is proposed, which assumes that a 180A degrees domain wall is formed at the interface upon magnetization reversal in the magnetically soft layer.
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8.

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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9.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yen F., Lorenz B., Sun Y. Y., Chu C. W., Bezmaternykh L. N., Vasiliev A. N.
Заглавие : Magnetic field effect and dielectric anomalies at the spin reorientation phase transition of GdFe3(BO3)(4)
Разночтения заглавия :авие SCOPUS: Magnetic field effect and dielectric anomalies at the spin reorientation phase transition of GdFe3 (BO3) 4
Место публикации : Phys. Rev. B: AMERICAN PHYSICAL SOC, 2006. - Vol. 73, Is. 5. - Ст.54435. - ISSN 1098-0121, DOI 10.1103/PhysRevB.73.054435
Примечания : Cited References: 21
Предметные рубрики: IRON BORATE GDFE3(BO3)(4)
HOMNO3
ANISOTROPY
PR
SM
Аннотация: GdFe3(BO3)(4) exhibits a structural phase transition at 156 K, antiferromagnetic order of the Fe3+ moments at 36 K, followed by a spin reorientation phase transition at 9 K. The reorientation phase transition is studied through dielectric, magnetic, and heat capacity measurements under the application of external magnetic fields of up to 7 kOe. The dielectric constant indicates the existence of two distinct anomalies at T-SR=9 K that separate in temperature under external magnetic fields. The spin rotation phase transition is proven to be of the first-order nature through the magnetic analog of the Clausius-Clapeyron equation. Magnetodielectric effect of up to 1% is observed at 8 K and 7 kOe. The uniaxial magnetocaloric effect along the c axis is observed below the spin reorientation phase transition of 9 K.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Man'kov Y. I.
Заглавие : Effect of conduction electrons on the law of approach to saturation of a metallic ferromagnet with surface pinning of the magnetic moment
Место публикации : Phys. Solid State: AMER INST PHYSICS, 1999. - Vol. 41, Is. 4. - P582-588. - ISSN 1063-7834, DOI 10.1134/1.1130829
Примечания : Cited References: 37
Предметные рубрики: ANISOTROPY
Аннотация: The effect of conduction electrons on the magnetization curve of a metallic ferromagnet with surface pinning of the magnetic moment is investigated theoretically. The electronic contribution is due to the rearrangement of the discrete spectrum of charge carriers trapped by the nonuniform magnetic induction of such a ferromagnet, and it is a kind of diamagnetic effect that appreciably decreases the volume-averaged magnetization of the ferromagnet. A power-law dependence H-3/4 on the external magnetic field H is obtained according to the law of magnetization approach to saturation. This dependence is due to the contribution of the conduction electrons. (C) 1999 American Institute of Physics. [S1063-7834(99)01804-3].
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