Variation of Magnetocrystalline Anisotropy of Iron with Field and Temperature

Abstract
The magnetocrystalline anisotropy constant K1 of iron was determined from static torque measurements on a {001} single-crystal disk at fields between 3000 and 18 000 Oe, and at temperatures between 77 and 900°K. It was found that (i) (K1T)K110(MT)M above 300°K, in agreement with Zener; (ii) (K1H)K122(MH)M below 600°K, and at H10 KOe; and (iii) (K1H)(K1T)1.25×103°K/Oe over the whole temperature range of this investigation.