Magnetic anisotropy of a system of nanocrystalline BaO·6Fe2O3 particles |
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| Authors: | Z V Golubenko L P Ol’khovik Yu A Popkov Z I Sizova A S Kamzin |
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| Institution: | (1) Khar’kov State University, Khar’kov, Ukraine;(2) A. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia |
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| Abstract: | The anisotropy of a system of barium ferrite particles with an average diameter of 60 nm has been studied. The effective anisotropy
constant has been determined in the temperature range from 4.2 K to T
c by the law governing approach to saturation magnetization. The observed deviation from the magnetocrystalline anisotropy
constant is explained as due to a negative contribution of the “surface” anisotropy constant. An estimate is made of this
contribution as a function of particle size.
Fiz. Tverd. Tela (St. Petersburg) 40, 1894–1897 (October 1998) |
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