講演情報
[8p-E208-18]Antiparallel magnetization alignment by selective heat-assisted magnetization reversal for single-material anomalous Nernst heat-flux sensor
〇Weinan Zhou1, Hirofumi Suto1, Yuya Sakuraba1 (1.NIMS)
キーワード：
anomalous Nernst effect、heat-flux sensor、heat-assisted magnetization reversal
A heat flux sensor based on the anomalous Nernst effect usually consists of an array of magnetic wires that are electrically connected by another material so that the anomalous Nernst voltages add constructively. However, the difference in Seebeck coefficients of the constituent materials can give rise to an undesirable offset in the sensor output when an in-plane component of temperature gradient is present. In this study, to address this issue, we propose an anomalous Nernst heat-flux sensor made from a single magnetic material, so that no Seebeck-coefficient difference exists between neighboring wires. The magnetizations of neighboring wires are in antiparallel alignment, resulting in additive anomalous Nernst voltages. This magnetization configuration is realized by selective heat-assisted magnetization reversal induced by electric-current-driven Joule heating.