Magnetic-field-angle dependence of coercivity in CoFeB/MgO magnetic tunnel junctions with perpendicular easy axis

J. Igarashi; Justin Llandro; Hideo Sato; Fumihiro Matsukura; Hideo Ohno

doi:10.1063/1.5004968

Magnetic-field-angle dependence of coercivity in CoFeB/MgO magnetic tunnel junctions with perpendicular easy axis

J. Igarashi, Justin Llandro, Hideo Sato, Fumihiro Matsukura, Hideo Ohno

Research output: Contribution to journal › Article

8 Citations (Scopus)

Abstract

We investigate the magnetization-reversal mode in CoFeB/MgO magnetic tunnel junctions with perpendicular easy axis from the magnetic-field-angle dependence of coercivity. The reversal in a free layer with diameter of ∼20 nm is found to be in a good agreement with coherent reversal mode for a device with a reference layer much larger than the free layer. However, the reversal mode is quite different in a junction in which the two layers are almost the same size. From micromagnetic simulation, the difference is attributed to the reduction of the magnetic anisotropy in the vicinity of the device edge.

Original language	English
Article number	132407
Journal	Applied Physics Letters
Volume	111
Issue number	13
DOIs	https://doi.org/10.1063/1.5004968
Publication status	Published - 2017 Sep 25

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Igarashi, J., Llandro, J., Sato, H., Matsukura, F., & Ohno, H. (2017). Magnetic-field-angle dependence of coercivity in CoFeB/MgO magnetic tunnel junctions with perpendicular easy axis. Applied Physics Letters, 111(13), [132407]. https://doi.org/10.1063/1.5004968

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