Abstract
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 language | English |
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Pages (from-to) | 1521-1525 |
Number of pages | 5 |
Journal | journal of the physical society of japan |
Volume | 69 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2000 May |
Keywords
- Antiferromagnetic resonance
- Electron spin resonance
- GdAs
- Low carrier system
- Spin structure
ASJC Scopus subject areas
- Physics and Astronomy(all)