Temperature Dependence of Anisotropy Energy of Ferromagnetics

抄録

The temperature dependence of anisotropy energy of ferromagnetics was calculated by the spin wave method which assumes the existence of only pseudodipole interaction which included some restricted long range forces. The temperature dependence obtained is (M⁄M₀)¹⁶, a result which is in fairly satisfactory agreement with the experimental (M⁄M₀)²⁰ law, and is an improvement on Van Vleck’s result (M⁄M₀)³. This small discrepancy is discussed from the standpoint of s-d interaction.