Formation, Shift and Magneto-optical Detection of Magnetic Domain Queue in Magnetic Nanowire Memory

摘要

We are conducting R&D on a magnetic nanowire memory, which realizes an ultra-high data-transfer-rate for high data rate video such as spatial imaging three-dimensional (3D) television. In this report, we fabricated a magnetic nanowire memory element with an integrated writer and investigated an operational principle of magnetic domains formation and shifting for realizing memory operation dynamics. After magnetic domain queue was formed by the writer just underneath region, we succeeded for the first time in detecting the motion of magnetic domain shifting using magneto-optical Kerr microscopy by applying pulse current along nanowire longitudinal direction. We verified the operational principle of the magnetic nanowire memory through the sequence test of formation (recording), shifting, and detection (reproducing) of a magnetic domain queue, and show the potentials for future memory applications.