Antiferromagnetic resonance in charge ordering state of Pr 0.5Ca0.5MnO3-δ single crystal

S. Kawamata, S. Noguchi, K. Okuda, H. Nojiri, M. Motokawa

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

An antiferromagnetic resonance (AFMR) is observed in the charge ordered antiferromagnetic phase of Pr0.5Ca0.5MnO 3-δ single crystal for the first time. Above the Néel temperature, TN = 173 K, a paramagnetic resonance with g = 2.0 is observed, There is no significant change of the resonance spectra at the charge ordering transition temperature, Tco = 242K, Below TN, a branch of AFMR is found. Since the resonance field of this mode increases linearly as the frequency is decreased, this branch is assigned, as the spin-flop mode. Below 60K, the critical fields, Bc, evaluated as the extrapolation of this mode to zero frequency agree well with the insulator-metal transition fields, BCO, at which the melting of the charge-ordering phase occurs. Present results indicate that the temperature dependence of B co is affected by the temperature dependence of Bc.

Original languageEnglish
Pages (from-to)854-856
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume226-230
Issue numberPART I
DOIs
Publication statusPublished - 2001

Keywords

  • Charge ordering
  • Dependent
  • Perovskite structure
  • Phase transitions-field
  • Resonance-antiferromagnetic

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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