Electric-field guiding of magnetic skyrmions

Upadhyaya, Pramey; Yu, Guoqiang; Amiri, Pedram Khalili; Wang, Kang L.

doi:10.1103/PhysRevB.92.134411

Title: Electric-field guiding of magnetic skyrmions

Journal Article · Thu Oct 15 00:00:00 EDT 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.92.134411· OSTI ID:1370866

Upadhyaya, Pramey ^[1]; Yu, Guoqiang ^[1]; Amiri, Pedram Khalili ^[1]; Wang, Kang L. ^[1]

Univ. of California, Los Angeles, CA (United States)

We theoretically study equilibrium and dynamic properties of nanosized magnetic skyrmions in thin magnetic films with broken inversion symmetry, where an electric field couples to magnetization via spin-orbit coupling. Based on a symmetry-based phenomenology and micromagnetic simulations we show that this electric-field coupling, via renormalizing the micromagnetic energy, modifies the equilibrium properties of the skyrmion. This change, in turn, results in a significant alteration of the current-induced skyrmion motion. Particularly, the speed and direction of the skyrmion can be manipulated by designing a desired energy landscape electrically, which we describe within Thiele's analytical model and demonstrate in micromagnetic simulations including electric-field-controlled magnetic anisotropy. We additionally use this electric-field control to construct gates for controlling skyrmion motion exhibiting a transistorlike and multiplexerlike function. Furthermore, the proposed electric-field effect can thus provide a low-energy electrical knob to extend the reach of information processing with skyrmions.

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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012670

OSTI ID:: 1370866

Alternate ID(s):: OSTI ID: 1223584

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 13; Related Information: SHINES partners with University of California, Riverside (lead); Arizona State University; Colorado State University; Johns Hopkins University; University of California Irvine; University of California Los Angeles; University of Texas at Austin; ISSN 1098-0121

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 78 works

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