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The modulated magnetic structure of alpha-Fe2O3 : Ga weak ferromagnet / Z. T. Azamatov [et al.] // Tech. Phys. - 2001. - Vol. 46, Is. 3. - P. 354-356, DOI 10.1134/1.1356491. - Cited References: 7 . - ISSN 1063-7842

РУБ Physics, Applied

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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Держатели документа:
Tashkent State Univ, Tashkent 700095, Uzbekistan
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Tashkent State University, Universitetskaya Ul. 95, Vuzgorodok, Tahskent, 700095, Uzbekistan
Kirenskii Inst. of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Azamatov, Z. T.; Karaev, A. A.; Sokolov, B. Y.; Fedorov, Y. M.
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Karaev, A. A.
Induced magnetic superstructure in the FeBO3 : Mg weak ferromagnet / A. A. Karaev, B. Y. Sokolov, Y. M. Fedorov // Phys. Solid State. - 2000. - Vol. 42, Is. 11. - P. 2097-2102, DOI 10.1134/1.1324046. - Cited References: 13 . - ISSN 1063-7834

РУБ Physics, Condensed Matter

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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Держатели документа:
Tashkent State Univ, Tashkent 700095, Uzbekistan
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Sokolov, B. Y.; Fedorov, Y. M.
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