Concepedia

Current-induced effective field in perpendicularly magnetized Ta/CoFeB/MgO wire

Takahiro Suzuki, Shunsuke Fukami, N. Ishiwata, Michihiko Yamanouchi, Shoji Ikeda, N. Kasai, Hideo Ohno

Applied Physics Letters · 2011 · 152 citations · 8 references

DOI

Concepts

Abstract

The current-induced effective field in perpendicularly magnetized Ta/CoFeB/MgO wire was investigated. A threshold field decrease of 6.4 kOe/mA was observed by measuring the threshold field of Hall resistance versus the magnetic field curve with various bias currents. The decrease was probably caused by the in-plane effective field, mainly due to the Rashba effect. The effective field of the Ta/CoFeB/MgO wire was smaller and opposite in direction compared to that of Pt/Co/AlOx previously reported.

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