Phase Transitions in the Uniaxial Antiferromagnet
作者:
H. Rohrer,
H. Thomas,
期刊:
Journal of Applied Physics
(AIP Available online 1969)
卷期:
Volume 40,
issue 3
页码: 1025-1027
ISSN:0021-8979
年代: 1969
DOI:10.1063/1.1657515
出版商: AIP
数据来源: AIP
摘要:
We have studied the transitions induced by fields of arbitrary direction between the antiferromagnetic, the spin‐flop, and the paramagnetic phase of a two‐sublattice uniaxial antiferromagnet at zero temperature in molecular‐field approximation. We find that the phase boundary between the antiferromagnetic and the spin‐flop phase in theHplane extends only to a maximum angle with respect to the easy axis of order (anisotropy energy/exchange energy), where it ends in critical points. This behavior explains the sensitive angular dependence of ultrasonic absorption and magnetic resonance experiments.
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