Magnetocrystalline anisotropy
（重定向自Crystal anisotropy）
![](/Images/godic/202501/07/Easy_axes4414.jpg")
![Uniaxial anisotropy energy plotted for 2D case. The magnetization direction is constrained to vary on a circle and the energy takes different values with the minima indicated by the vectors in red.](/Images/godic/202501/07/Uniaxial_Anisotropy4414.jpg")
![](/Images/godic/202501/07/Rhombohedral.svg4414.png")
![A representation of an easy cone. All the minimum-energy directions (such as the arrow shown) lie on this cone.](/Images/godic/202501/07/EasyCone4414.png")
In physics, a ferromagnetic material is said to have magnetocrystalline anisotropy if it takes more energy to magnetize it in certain directions than in others. These directions are usually related to the principal axes of its crystal lattice. It is a special case of magnetic anisotropy.