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

Sa Tu, Junfeng Hu, Guoqiang Yu, Haiming Yu, Chuanpu Liu, Florian Heimbach, Xiangrong Wang, Jianyu Zhang, Youguang Zhang, Amir Hamzić, Kang L. Wang, Weisheng Zhao, Jean Philippe Ansermet

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12 Citations (Scopus)

Abstract

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 μV/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.

Original languageEnglish
Article number222401
JournalApplied Physics Letters
Volume111
Issue number22
DOIs
Publication statusPublished - 2017 Nov 27

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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