Magnetic transitions and ferromagnetic clusters in RuSr2(Eu, Ce)2Cu2O10+δ

Y. Y. Xue, B. Lorenz, D. H. Cao, C. W. Chu

研究成果: Article同行評審

30 引文 斯高帕斯(Scopus)

摘要

The macroscopic magnetizations of a RuSr2(Eu0.7Ce0.3)2Cu2O10+δ sample were investigated. A ferromagnetlike transition occurs around TM in the low-field magnetization. Highly nonlinear M(H), non-Curie-Weiss susceptibility, and slow spin dynamics, however, were observed up to T1 ≈ (2–3)TM. In addition, an antiferromagnetlike differential-susceptibility maximum of Ru appears around a separate temperature TAM between T1 and TM. The data are therefore consistent with a phase-separation model: superparamagnetic clusters (or short-range spin orders) are first precipitated from the paramagnetic matrix below T1, followed by an antiferromagnetic transition of the matrix at TAM and an apparent ferromagnetic (FM) transition around TM, where the long-range spin order is established in the FM species embedded in the matrix.

原文English
期刊Physical Review B - Condensed Matter and Materials Physics
67
發行號18
DOIs
出版狀態Published - 2003 5月 8

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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