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- Title
Quantum effects of magnetization of an easy-axis ferromagnet with S = 1.
- Authors
Kalita, V.; Ivanova, I.; Loktev, V.
- Abstract
We analyze the influence of quantum effects on magnetic properties of a strongly anisotropic easy-axis ferromagnet with single-ion anisotropy comparable to the exchange interaction of spins with S = 1. We show that in this case, despite the quantum approach, we can apply a description inspired by the Landau theory of phase transitions. We consider two magnetization cases: by a longitudinal and by a transverse external magnetic field. We determine the critical values of the fields and find quantum corrections manifested in the so-called 'shortening' of the mean spin modulus. We find that for a sufficiently large single-ion anisotropy, the angular dependence of the critical field differs from the Stoner-Wohlfarth astroid.
- Subjects
FERROMAGNETISM; QUANTUM phase transitions; ANISOTROPY; QUANTUM theory; MAGNETIC fields; MAGNETIZATION; MATHEMATICAL models
- Publication
Theoretical & Mathematical Physics, 2012, Vol 173, Issue 2, p1620
- ISSN
0040-5779
- Publication type
Article
- DOI
10.1007/s11232-012-0136-0