Determination of the surface anisotropy contribution to the magnetic anisotropy field of a nanocrystalline barium ferrite powder at various temperatures |
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| Authors: | L P Ol’khovik Z I Sizova E V Shurinova A S Kamzin |
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| Institution: | (1) Kharkov National University, Svobody sq. 4, Kharkov, 61077, Ukraine;(2) Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia |
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| Abstract: | The temperature dependence of the average anisotropy field of a nanocrystalline barium hexaferrite powder was studied by treating remanent-magnetization curves with inclusion of thermal fluctuations. The contribution of surface anisotropy was isolated; its nonstandard temperature dependence is intimately related to the specific features of formation of near-surface regions in ultrathin particles. |
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