講演情報
[8p-N303-2]Nernst effect in ferromagnetic Fe2-xPdxMo3N thin films skyrmions
〇Kanchi Yamamoto1, Hirofumi Kyou1, Hidehumi Asano2, Toshio Miyamachi1, Masaki Mizuguchi1 (1.Nagoya Univ., 2.Nagoya Industrial Science Institute)
キーワード：
Nernst effect、skyrmion
Magnetic skyrmions, distinguished by their topologically protected spin configurations, have garnered considerable attention for thermoelectric device applications and thermal sensing technologies owing to their distinctive transport properties. Recent investigations have shown that, beyond the traditional anomalous Nernst effect (ANE) determined by Berry curvature from bulk magnetization, skyrmion presence generates a unique topological Nernst effect (TNE) originating from the emergent electromagnetic field linked to their spin architecture. This phenomenon produces amplified transverse thermoelectric responses that exhibit high sensitivity to skyrmion concentration and arrangement.
Multiple material systems including MnSi, Co-Zn-Mn alloys, and multilayer structures have exhibited TNE related to skyrmions, especially within low-temperature or limited-field conditions. In the present work, we examine Fe2-xPdxMo3N (FPMN) thin films, which are remarkable for supporting small-diameter skyrmions that remain stable across extensive temperature and magnetic field ranges. These films present an attractive platform for room-temperature thermoelectric applications through their chemically adjustable Dzyaloshinskii–Moriya interaction (DMI) and stable skyrmion phase characteristics. We explore the Nernst behavior of FPMN thin films and their relationship with the magnetic phase diagram, highlighting the particle-like response of skyrmions to thermal gradients.
Multiple material systems including MnSi, Co-Zn-Mn alloys, and multilayer structures have exhibited TNE related to skyrmions, especially within low-temperature or limited-field conditions. In the present work, we examine Fe2-xPdxMo3N (FPMN) thin films, which are remarkable for supporting small-diameter skyrmions that remain stable across extensive temperature and magnetic field ranges. These films present an attractive platform for room-temperature thermoelectric applications through their chemically adjustable Dzyaloshinskii–Moriya interaction (DMI) and stable skyrmion phase characteristics. We explore the Nernst behavior of FPMN thin films and their relationship with the magnetic phase diagram, highlighting the particle-like response of skyrmions to thermal gradients.