Antiferromagnetic resonance and magnetic structure of GdAs

Keiichi Koyama, Makoto Yoshida, Hiroyuki Nojiri, Takuo Sakon, Dexin Li, Takashi Suzuki, Mituhiro Motokawa

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


Electron spin resonance measurements on single-crystal and powder of GdAs have been performed in the temperature range from 4.2 to 40 K and in the frequency range from 55 to 585 GHz to obtain microscopic information about the magnetic structure. The results obtained indicate that GdAs is an "easy-plane" antiferromagnet with the magnetic moment lying in the (111) plane below Néel temperature (∼20K). According to an analysis of mean field approximation, the exchange field and the out-of-plane anisotropy field have been estimated to be μ0HE = 8.1T and μ0HA = 1.4T, respectively. The transition field (Hc = 2HE + HA) from the antiferromagnetic to the forced ferromagnetic state is 17.6 T.

Original languageEnglish
Pages (from-to)1521-1525
Number of pages5
Journaljournal of the physical society of japan
Issue number5
Publication statusPublished - 2000 May


  • Antiferromagnetic resonance
  • Electron spin resonance
  • GdAs
  • Low carrier system
  • Spin structure

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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