STRUCTURAL PROPERTIES AND SURFACE ANISOTROPY IN TB/FE - MULTILAYER FILMS

抄録

  The perpendicular anisotropy of Tb/Fe multilayer films depends on the thickness of the Tb and the Fe single layers. The existence of a compensation point up to a periodicity length of 3 nm and a well defined curietemperature up to a periodicity length of 3.7 nm reveals a long range antiferromagnetic coupling of the Tb films to the Fe films. For multilayer films with constant thickness of the Tb layer t_Tb but modified thickness of the Fe layer t_Fe the anisotropy is reciprocal to the thickness of the Fe layer (k^eff_U α 1⁄t_Fe), which indicates the existence of a surface anisotropy at the interface.