Title: Energy storage in magnetic textures driven by vorticity flow

Abstract

Here, an experimentally feasible energy-storage concept is formulated based on vorticity (hydro)dynamics within an easy-plane insulating magnet. The free energy associated with the magnetic winding texture is built up in a circular easy-plane magnetic structure by injecting a vorticity flow in the radial direction. The latter is accomplished by electrically induced spin-transfer torque, which pumps energy into the magnetic system in proportion to the vortex flux. The resultant magnetic metastable state with a finite winding number can be maintained indefinitely because the process of its relaxation via phase slips is exponentially suppressed when the temperature is brought well below the Curie temperature. We characterize the vorticity-current interaction underlying the energy-loading mechanism through its contribution to the effective electric inductance in the rf response. Our proposal may open an avenue for naturally powering spintronic circuits and nontraditional magnet-based neuromorphic networks.

Authors:

Jones, Dalton  ^[1];

• Search DOE PAGES for author "Jones, Dalton"
• Search DOE PAGES for ORCID "0000-0002-7310-3241"

Zou, Ji  ^[1];

• Search DOE PAGES for author "Zou, Ji"
• Search DOE PAGES for ORCID "0000-0003-0828-1153"

Zhang, Shu  ^[1];

• Search DOE PAGES for author "Zhang, Shu"
• Search DOE PAGES for ORCID "0000-0001-5011-8566"

Tserkovnyak, Yaroslav ^[1]

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+ Show Author Affiliations

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

Publication Date:

Wed Oct 28 00:00:00 EDT 2020

Research Org.:

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

Sponsoring Org.:

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

OSTI Identifier:

1851597

Grant/Contract Number:  

SC0012190

Resource Type:

Accepted Manuscript

Journal Name:

Physical Review. B

Additional Journal Information:

Journal Volume: 102; Journal Issue: 14; Journal ID: ISSN 2469-9950

Publisher:

American Physical Society (APS)

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; dissipative dynamics; magnetic vortices; phase slips; spin dynamics; XY model