journal article·2017-05-01Open access

Magnetic domain-wall creep driven by field and current in Ta/CoFeB/MgO

S. DuttaGupta, S. Fukami, B. Kuerbanjiang, H. Sato, F. Matsukura, V. K. Lazarov, H. Ohno

AIP Advances· Volume 7· Issue 5

Abstract

Creep motion of magnetic domain wall (DW), thermally activated DW dynamics under subthreshold driving forces, is a paradigm to understand the interaction between driven interfaces and applied external forces. Previous investigation has shown that DW in a metallic system interacts differently with current and magnetic field, manifesting itself as different universality classes for the creep motion. In this article, we first review the experimental determination of the universality classes for current- and field-driven DW creeps in a Ta/CoFeB/MgO wire, and then elucidate the underlying factors governing the obtained results. We show that the nature of torque arising from current in association with DW configuration determines universality class for the current-induced creep in this system. We also discuss the correlation between the field-induced DW creep characteristics and structure observed by a transmission electron microscope. The observed results are expected to provide a deeper understanding for physics of DW motion in various magnetic materials.
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Research context

OpenAlex topics: Magnetic properties of thin films · Magnetic Properties and Applications · Metallic Glasses and Amorphous Alloys

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 Research Network, , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan

Tohoku University 3 Center for Spintronics Integrated Systems, , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan

Tohoku University 4 Center for Innovative Integrated Electronic Systems, , 468-1 Aramaki Aza Aoba, Aoba-ku, Sendai 980-0845, Japan

University of York 5 Department of Physics, , Heslington, York YO10 5DD, United Kingdom

Tohoku University 6 WPI-Advanced Institute for Materials Research, , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan

Funding

Council for Science, Technology and Innovation · Japan Society for the Promotion of Science · Engineering and Physical Sciences Research Council · Ministry of Education, Culture, Sports, Science and Technology

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