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

Authors
Journal
Journal of Magnetism and Magnetic Materials
0304-8853
Publisher
Elsevier
Publication Date
Volume
300
Issue
1
Identifiers
DOI: 10.1016/j.jmmm.2005.10.129
Keywords
  • Spin-Glass
  • Manganites
  • Phase Transition
  • Magnetocaloric Effect

Abstract

Abstract Magnetic field-induced step-like changes in magnetization of Sm 1− x Sr x MnO 3 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.

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