界面ジャロシンスキー守谷相互作用が働く1次元強磁性細線における終端磁化の内部磁区への影響

抄録

  An interfacial Dzyaloshinskii–Moriya interaction (DMI) is caused in a ferromagnetic metal on heavy metal. In the perpendicularly magnetized nanowire on heavy metal, several magnetic states are formed via the interfacial DMI. Attempts to create and use magnetic domain structures in devices are attracting attention. By the wire edge, the magnetic moments are canted by the interfacial DMI. The canted magnetic moments may affect magnetic moments inside the wire. We simulate the magnetic moments and the stability of a magnetic domain in a perpendicularly magnetized one-dimensional wire with the interfacial DMI by using the micro-magnetic simulation. We find that the domain is stabilized via the canted magnetization by the wire edge and the domain length linearly decreases with decreasing wire length.