Angular and temperature dependence of current induced spin-orbit effective fields in Ta/CoFeB/MgO nanowires

Xuepeng Qiu, Praveen Deorani, Kulothungasagaran Narayanapillai, Ki Seung Lee, Kyung Jin Lee, Hyun Woo Lee, Hyunsoo Yang

Research output: Contribution to journalArticle

146 Citations (Scopus)

Abstract

Current induced spin-orbit effective magnetic fields in metal/ferromagnet/oxide trilayers provide a new way to manipulate the magnetization, which is an alternative to the conventional current induced spin transfer torque arising from noncollinear magnetization. Ta/CoFeB/MgO structures are expected to be useful for non-volatile memories and logic devices due to its perpendicular anisotropy and large current induced spin-orbit effective fields. However many aspects such as the angular and temperature dependent phenomena of the effective fields are little understood. Here, we evaluate the angular and temperature dependence of the current-induced spin-orbit effective fields considering contributions from both the anomalous and planar Hall effects. The longitudinal and transverse components of effective fields are found to have strong angular dependence on the magnetization direction at 300â..K. The transverse field decreases significantly with decreasing temperature, whereas the longitudinal field shows weaker temperature dependence. Our results reveal important features and provide an opportunity for a more comprehensive understanding of current induced spin-orbit effective fields.

Original languageEnglish
Article number4491
JournalScientific reports
Volume4
DOIs
Publication statusPublished - 2014 Mar 27

ASJC Scopus subject areas

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