Origin of the Periodic Component of Anisotropy Dispersion in Ni-Fe Films II

The periodic component of the angular dispersion α 90 was measured on Ni-Fe films of various compositions deposited onto glass substrates kept at different temperatures. When the substrate temperature t s is about 300°C, the films are almost free from the stress and thus the angular dispersion α 90 comes mainly from the magneto-crystalline anisotropy K 1 of the crystallites. However, if t s is far below 300°C, then α 90 comes not only from K 1 but also from the magneto-elastic anisotropy K σ , α 90 ∝( K 1 2 + K σ 2 ) 1/2 / K u , where K u is the uniaxial anisotropy constant of the film. The anisotropic part of the stress σ a estimated from α 90 depends on the substrate temperature as σ a ∼(300- t s )×10 7 ( d y n /cm 2 ).