Correlation between electron spin resonance and magnetization in Gd5 Ge4

Z. W. Ouyang, H. Nojiri, Shunsuke Yoshii, G. H. Rao, Y. C. Wang

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Electron spin resonance (ESR) across the field-induced antiferromagnetic (AFM) to ferromagnetic (FM) transition in Gd5 Ge4 has been studied. The AFM-FM transition can be characterized as an anomaly in the ESR spectrum. In the high-field FM state, a single strong ESR peak is observed while in the low-field AFM state, the ESR spectrum presents relatively weak double peaks. In the coexisting AFM and FM phases, the ESR spectrum is an asymmetrical double-peak structure due to a superposition of AFM and FM resonances. Thus, the ESR result is significantly correlated with magnetization. The g value for FM resonance is found to be close to g=1.992 for the free Gd3+ ion. The exchange interactions in the AFM state are discussed qualitatively.

Original languageEnglish
Article number054401
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number5
DOIs
Publication statusPublished - 2009 Aug 3

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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