Temperature dependence of the voltage-controlled perpendicular anisotropy in nanoscale MgO|CoFeB|Ta magnetic tunnel junctions

Juan G. Alzate, Pedram Khalili Amiri, Guoqiang Yu, Pramey Upadhyaya, Jordan A. Katine, Juergen Langer, Berthold Ocker, Ilya N. Krivorotov, Kang L. Wang

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91 引文 斯高帕斯(Scopus)

摘要

In this work, we experimentally study the temperature dependence of the perpendicular magnetic anisotropy (PMA) and of the voltage-controlled magnetic anisotropy (VCMA) in nanoscale MgO|CoFeB|Ta-based magnetic tunnel junctions. We demonstrate that the temperature dependences of both the PMA and the VCMA coefficient follow power laws of the saturation magnetization, but with different exponents. We also find that the linear dependence of the PMA on electric field is maintained over a wide temperature range, although the VCMA strength decreases faster as a function of temperature as compared to the PMA. Possible mechanisms leading to the different exponents are discussed.

原文English
文章編號112410
期刊Applied Physics Letters
104
發行號11
DOIs
出版狀態Published - 2014 三月 17

All Science Journal Classification (ASJC) codes

  • 物理與天文學(雜項)

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