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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Karaev A. A., Sokolov B. Y., Fedorov Y. M.
Заглавие : Induced magnetic superstructure in the FeBO3 : Mg weak ferromagnet
Место публикации : Phys. Solid State: AMER INST PHYSICS, 2000. - Vol. 42, Is. 11. - P2097-2102. - ISSN 1063-7834, DOI 10.1134/1.1324046
Примечания : Cited References: 13
Аннотация: The domain structure of a FeBO3 : Mg single crystal was studied with a polarizing microscope. It was found that application of a magnetic field along the hard axis in the basal plane of this weak ferromagnet gives rise, within a certain field-strength interval, to a magnetic superstructure observed against the background of the macrodomain structure of the sample. The magnetic superstructure is visually represented as a quasi-periodic system of bands oriented perpendicular to the applied field, with an alternating magneto-optic image contrast along an axis coinciding with the magnetic-field direction. The absence of sharp changes in the contrast of the magnetic superstructure image along this axis is explained as being due to the smooth variation of the sublattice magnetic-moment azimuth with spatial coordinates. The results obtained are discussed within the parameters of the instability of a uniform magnetic state of a system in the random field induced by a magnetic field. (C) 2000 MAIK "Nauka/Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Azamatov Z. T., Karaev A. A., Sokolov B. Y., Fedorov Y. M.
Заглавие : The modulated magnetic structure of alpha-Fe2O3 : Ga weak ferromagnet
Разночтения заглавия :авие SCOPUS: The modulated magnetic structure of α-Fe2O3 : Ga weak ferromagnet
Место публикации : Tech. Phys.: AMER INST PHYSICS, 2001. - Vol. 46, Is. 3. - P354-356. - ISSN 1063-7842, DOI 10.1134/1.1356491
Примечания : Cited References: 7
Аннотация: The domain structure of a diluted weak alpha -Fe2O3 : Ga ferromagnet is considered. Magnetic fields of specific amplitudes and orientations applied in the basal plane of the crystal are found to produce nonuniform magnetic states due to a periodic deviation of the antiferromagnetic vector from the easy axis of crystallographic anisotropy. A phase diagram of the modulated magnetic state with the triad axis is constructed, and a dependence of the spatial period of modulation on an external magnetic field is studied. A phenomenological model and the nature of the magnetic superstructure discovered are discussed. (C) 2001 MAIK "Nauka/Interperiodica".
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