Abstract
Recently, various technologies of higher density version that exceed optical resolution are proposed for MO disk, and have been put to practical use. In those technologies, the domain wall displacement detection (DWDD) is one of excellent readout methods, which utilizes the characteristic of magnetic film called wall-displacement phenomenon by temperature gradient. This method has no limit of resolution in principle. In the present paper, we try to apply the three-dimensional FDTD method to the analysis of the light-beam scattering and the characteristic of detected signal for expansion of magnetic domain on DWDD disk mode.
