Skyrmion creation and annihilation by spin waves

Liu, Yizhou; Yin, Gen; Zang, Jiadong; Shi, Jing; Lake, Roger K.

doi:10.1063/1.4933407

Title: Skyrmion creation and annihilation by spin waves

Journal Article · 16 October 2015 · Applied Physics Letters

DOI: https://doi.org/10.1063/1.4933407 · OSTI ID:1370864

Liu, Yizhou ^[1]; Yin, Gen ^[1]; Zang, Jiadong ^[2]; Shi, Jing ^[3]; Lake, Roger K. ^[1]

Univ. of California, Riverside, CA (United States). Dept. of Electrical and Computer Engineering
Univ. of New Hampshire, Durham, NH (United States). Dept. of Physics and Material Science Program
Univ. of California, Riverside, CA (United States). Dept. of Physics and Astronomy

Single skyrmion creation and annihilation by spin waves in a crossbar geometry are theoretically analyzed. A critical spin-wave frequency is required both for the creation and the annihilation of a skyrmion. The minimum frequencies for creation and annihilation are similar, but the optimum frequency for creation is below the critical frequency for skyrmion annihilation. If a skyrmion already exists in the cross bar region, a spin wave below the critical frequency causes the skyrmion to circulate within the central region. A heat assisted creation process reduces the spin-wave frequency and amplitude required for creating a skyrmion. Finally, the effective field resulting from the Dzyaloshinskii-Moriya interaction and the emergent field of the skyrmion acting on the spin wave drive the creation and annihilation processes.

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

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0012670

OSTI ID:: 1370864

Journal Information:: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 15 Vol. 107; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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