Contact solitons as spin pistons in one-dimensional ferromagnetic channels

Estiphanos, Medhanie; Iacocca, Ezio

doi:10.1103/physrevb.110.174424

Contact solitons as spin pistons in one-dimensional ferromagnetic channels

Journal Article · Thu Nov 14 00:00:00 EST 2024 · Physical Review. B

DOI:https://doi.org/10.1103/physrevb.110.174424· OSTI ID:2477204

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University of Colorado, Colorado Springs, CO (United States); University of Colorado Colorado Springs
University of Colorado, Colorado Springs, CO (United States)

Ferromagnetic channels subject to spin injection have been theoretically shown to sustain dissipative exchange flows (DEFs). In the strong injection regime, a soliton is stabilized at the injection site, which has been termed a contact soliton DEF or CS-DEF. Here, we investigate the modulation of CS-DEFs as a mechanism to inject magnons into a DEF. By varying the injection current, the parameters connecting the soliton with the DEF via a boundary layer are varied. These lead to a modification in the DEF which is interpreted as a spin piston. The injected magnons follow the expected dispersion relation of DEFs, akin to the Bogoliubov–de Gennes dispersion relation. As a result, this work demonstrates that changes in the injected current can pump magnons along a ferromagnetic channel via dissipative exchange flows.

View Accepted Manuscript (DOE)

Research Organization:: University of Colorado, Colorado Springs, CO (United States)

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

Grant/Contract Number:: SC0024339

OSTI ID:: 2477204

Journal Information:: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 17 Vol. 110; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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