Low-temperature relaxation of an anisotropic semiclassical spin: tunnel flipping
Ioselevich A. S.
The probability for the flipping of a spin s> 1 (with an easy-axis anisotropy) due to a transverse field or an interaction with phonons is calculated. The flipping is interpreted as a tunneling through a magnetic-anisotropy barrier. The behavior as a function of the temperature and the longitudinal field is derived.