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journal article·2017-05-01Open access

Current-induced magnetization switching in a nano-scale CoFeB-MgO magnetic tunnel junction under in-plane magnetic field

N. Ohshima, H. Sato, S. Kanai, J. Llandro, S. Fukami, F. Matsukura, H. Ohno

AIP Advances· Volume 7· Issue 5
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Source abstract

Abstract

We study current-induced magnetization switching properties of a magnetic tunnel junction with junction diameter of 19 nm and resistance-area product of 6 Ωμm2 in the nanosecond regime with and without in-plane magnetic field. At zero field, for both parallel (P)-to-anti-parallel (AP) and AP-to-P switchings, the probability of switching PSW approaches unity with the increase of pulse voltage duration τP. However, under in-plane magnetic field, PSW for P-to-AP switching starts to saturate at a value lower than unity with increasing τP, while AP-to-P switching remains the same as in the absence of in-plane magnetic field. This in-plane field dependence of PSW can be partially explained by the influence of electric-field modulation of magnetic anisotropy.
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Research context

Nanomaterials

OpenAlex topics: Magnetic properties of thin films · Magnetic Field Sensors Techniques · Physics of Superconductivity and Magnetism

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Tohoku University 1 Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan

Tohoku University 2 Center for Spintronics Integrated Systems, , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan

Tohoku University 3 Center for Innovative Integrated Electronic Systems, , 468-1 Aramaki Aza Aoba, Aoba-ku, Sendai 980-0845, Japan

Tohoku University 4 Center for Spintronics Research Network, , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan

Tohoku University 5 WPI Advanced Institute for Materials Research, , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan

Funding

Japan Society for the Promotion of Science · Research Institute of Electrical Communication, Tohoku University · Ministry of Education, Culture, Sports, Science and Technology

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