Orientational phase transitions in anisotropic rare-earth magnets at low temperatures
V. Yu. Irkhin, A. A. Katanin
Abstract
Orientational phase transitions are investigated within the Heisenberg model with single-site anisotropy. The temperature dependence of the cone angle is calculated within the spin-wave theory. The role of the quantum renormalizations of anisotropy constants is discussed. A comparison with the experimental data on the cone-plane orientational transition in holmium is performed.
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