Anomalous Nernst effect in Ir22Mn78/Co20Fe60B20/MgO layers with perpendicular magnetic anisotropy

作者:Tu, Sa; Hu, Junfeng; Yu, Guoqiang; Yu, Haiming*; Liu, Chuanpu; Heimbach, Florian; Wang, Xiangrong; Zhang, Jianyu; Zhang, Youguang; Hamzic, Amir; Wang, Kang L.; Zhao, Weisheng; Ansermet, Jean-Philippe
来源:Applied Physics Letters, 2017, 111(22): 222401.
DOI:10.1063/1.4996399

摘要

The anomalous Nernst effect in a perpendicularly magnetized Ir22Mn78/Co20Fe60B20/MgO thin film is measured using well-defined in-plane temperature gradients. The anomalous Nernst coefficient reaches 1.8 mu V/K at room temperature, which is almost 50 times larger than that of a Ta/Co20Fe60B20/MgO thin film with perpendicular magnetic anisotropy. The anomalous Nernst and anomalous Hall results in different sample structures revealing that the large Nernst coefficient of the Ir22Mn78/Co20Fe60B20/MgO thin film is related to the interface between CoFeB and IrMn. Published by AIP Publishing.