抄録
The magnetic anisotropy of the antiferromagnetic layer of Ni-Fe/Mn-Ni exchange-coupled bilayers was investigated by magnetic torque analysis. The Ni-Fe/Mn-Ni bilayers were highly oriented in their crystal-lographical axes in the film plane by epitaxial growth on MgO{110} single-crystal substrate. The magnetic anisotropy energy estimated from the saturated amplitude of torque curves is 6.4 x 105 erg/cm3. The symmetry of the magnetic anisotropy reflects the crystallographic symmetry of the antiferromagnetic layer. The easy axis of the magnetic anisotropy is independent of the direction of the applied field during the film deposition. We conclude that the origin of the magnetic anisotropy of the antiferromagnetic layer is magnetocrystalline anisotropy.
