Hysteresis curves and magnetization processes in a model for an amorphous magnet with random uniaxial anisotropy

摘要: We consider the magnetic field behavior of a simple model for an amorphous ferromagnet with random single‐ion anisotropy. The spins are taken as classical unit vectors located at sites dense packing and coupled via nearest‐neighbor exchange interactions. An easy‐axis direction is chosen each site. For large anisotropy, coercivity very hysteresis curves resemble those found TbFe2 low temperature. As anisotropy reduced, there fairly abrupt change in indicating that sufficiently weak effectively averaged away. have examined energy metastable states. results indicate canted aligned state always more stable than low‐moment spin‐glass‐like also magnetization process presence imposed domain walls find wall motion preceeded by rotation high‐coercivity regime.