Magnetic anisotropy of La0.7Sr0.3MnO3 nanopowders

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:335

Article

Radelytskyi, I.¹  Dluzewski, P.¹  Dyakonov, V.^1,2  Aleshkevych, P.¹  Kowalski, W.¹  Jarocki, P.¹  Szymczak, H.¹ 

[1] PAS, Inst Phys, PL-02668 Warsaw, Poland

[2] NASU, AA Galkin Donetsk Physicotech Inst, UA-83114 Donetsk, Ukraine

关键词: Mechanism of magnetic anisotropy;    La0.7Sr0.3MnO3 nanopowder;    Structure;    Magnetic susceptibility;    Core-shell structure;    TEM;   

DOI  :  10.1016/j.jmmm.2013.01.031

来源: Elsevier

【 摘 要 】

The magnetic anisotropy of La0.7Sr0.3MnO3 nanopowders was measured as a function of temperature by the modified singular point detection technique. In this method singularities indicating the anisotropy field were determined analyzing ac susceptibility data. The observed relationship between temperature dependence of anisotropy constant and temperature dependence of magnetization was used to deduce the origin of magnetic anisotropy in the nanopowders. It was shown that magnetic anisotropy of La0.7Sr0.3MnO3 nanopowder is determined by the two-ion (dipolar or pseudodipolar) and single-ion mechanisms. (c) 2013 Elsevier B.V. All rights reserved.

【 授权许可】

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