Antiferromagnetic resonance in (formula presented)

Naoki Toyota, T. Suzuki, H. Matsui, H. Tsuchiya, E. Negishi, K. Koyama

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1 Citation (Scopus)

Abstract

From microwave cavity transmission measurements at 23–110 GHz on (formula presented) we have observed an antiferromagnetic resonance (AFMR) in the antiferromagnetic insulating state below the metal-to-insulator transition temperature of (formula presented) The frequency-field dependence is fundamentally reproduced with a two-sublattice model for a biaxial anisotropy. The easy axis is confirmed to be the direction tilted by (formula presented) from c to (formula presented) and the hard axis is found to be close to (formula presented) The spin-flop field is identified to be 1.3 T through the frequency-field dependence for the easy axis. The AFMR is interpreted to be caused by spin waves excited on the (formula presented) spins, exclusively due to the large (formula presented) exchange interaction estimated by theoretical calculations. The exchange field and anisotropy fields for (formula presented) spin systems at 1.2 K are evaluated to be (formula presented) (formula presented) for the intermediate axis and (formula presented) T for the hard axis, respectively.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume67
Issue number2
DOIs
Publication statusPublished - 2003 Jan 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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