T. Ambrose et al., ANGULAR-DEPENDENCE OF EXCHANGE COUPLING IN FERROMAGNET ANTIFERROMAGNET BILAYERS/, Physical review. B, Condensed matter, 56(1), 1997, pp. 83-86
Angular dependence of the exchange coupling in a NiFe/CoO bilayer film
has been measured, Different angular dependence and symmetry have bee
n observed for the exchange field H-E and the coercivity H-C. The valu
es of H-E and H-C are due to unidirectional and uniaxial components of
the magnetic anisotropy energy, in which the odd and the even terms l
ead to H-E and H-C, respectively. The proposed free energy accounts fo
r the experimental results.