Magnetocrystalline anisotropy
501758
183425545
2008-01-10T16:54:11Z
WvEngen
2169600
propose merge into magnetic anisotropy
{{mergeto|Magnetic anisotropy|Talk:Magnetic anisotropy#Merger proposal|date=January 2008}}
'''Magnetocrystalline anisotropy''' is the energy cost per [[atom]] to align its [[magnetism|magnetization]] from one [[crystal|crystallographic]] direction to another. It is a special case of [[magnetic anisotropy]]. The spin-orbit interaction is the primary source of the magnetocrystalline [[anisotropy]].
The direction of a magnetization relative to body that supports it is determined mainly by two effects, shape anisotropy and magnetocrystalline anisotropy. The first arises from magnetostatic effects and the second from spin-orbit coupling between the spins and the lattice of the material. The magnetostatic effects can be worked out from micromagnetic calculations, but the magnetocrystalline anisotropy must be computed from the electronic structure of the material. This is an important quantity because it determines whether a magnetic material can be made into a good hard magnet, a good soft magnet or neither. Hard magnets are an essential component of electromagnetic motors and soft magnets are an essential component of transformers.
[[Category:Electric and magnetic fields in matter]]{{condensedmatter-stub}}
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