[10a-M101-9~12] 10.2 Fundamental and exploratory device technologies for spin

▲ [10a-M101-11] Spin thermoelectric microscopy of magnetic skyrmions

〇Ryo Iguchi¹, Shinya Kasai^1,2, Kazunari Koshikawa³, Naomichi Chinone³, Shinsuke Suzuki³, Ken-ichi Uchida^1,4,5 (1.NIMS, 2.JST-PRESTO, 3.Hamamatsu Photonics, 4.Tokyo Univ., 5.CSRN, Tohoku Univ.)

Keywords:Skyrmion, Spin caloritronics, Spin current

The magnetic skyrmion is a nanoscale topological object characterized by the winding of the magnetic moments, appearing in magnetic materials with broken inversion symmetry. Because of its low current threshold for driving, the skyrmions have been intensely studied toward novel memory and storage devices, where the skyrmions act a career of information. Their emergence and dynamics have been studied by using a variety of real-space microscopy methods, such as electron-beam, X-ray, and visible light spectroscopies and magnetic-force and scanning tunneling microscopies. In this work, we demonstrate a new method for imaging magnetic skyrmions; we show that the skyrmions can be visualized via thermoelectric signals of spin-caloritronic phenomena in combination with focused heating.