Possible spin-glass state in SmSr-manganites as the origin of the magnetization jumps

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:300

Article

Kalinov, A. V.^1,2  Fisher, L. M.¹  Voloshin, I. F.¹  Babushkina, N. A.³  Khomskii, D. I.^2,4  Palstra, T. T. M.² 

[1] All Russian Elect Engn Inst, Moscow, Russia

[2] Univ Groningen, NL-9747 AG Groningen, Netherlands

[3] Russian Res Ctr Kurchatov Inst, Moscow 123182, Russia

[4] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

关键词: Spin-glass;    Manganites;    Phase transition;    Magnetocaloric effect;   

DOI  :  10.1016/j.jmmm.2005.10.129

来源: Elsevier

【 摘 要 】

Magnetic field-induced step-like changes in magnetization of Sm1-xSrxMnO3 manganites were studied. A strong dependence of these features on the magnetic-field sweep rate was observed. The notable overheating of the sample, starting exactly at the start of the magnetic transition, was observed upon the transition. We suggest that quenched disorder leads to the formation of an inhomogeneous (spin-glass-like) state and to subsequent magnetization jumps driven by a release of latent heat. (C) 2005 Elsevier B.V. All rights reserved.

【 授权许可】

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