Measurement of Stress Anisotropy in Magnetic Thin Films by Fast Fourier Transform Method

This paper presents a novel method for measuring anisotropic stress in magnetic thin films. The proposed measuring method is based on a fast Fourier transform and optical interferometry. The anisotropic stresses in thin iron films are found to be more tensile in the edge area than in the center area, and more compressive in the tangential direction than in the radial direction.