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Title: Dynamics of coupled vortices in perpendicular field

Abstract

In this paper, we explore the coupling mechanism of two magnetic vortices in the presence of a perpendicular bias field by pre-selecting the polarity combinations using the resonant-spin-ordering approach. First, out of the four vortex polarity combinations (two of which are degenerate), three stable core polarity states are achieved by lifting the degeneracy of one of the states. Second, the response of the stiffness constant for the vortex pair (similar polarity) in perpendicular bias is found to be asymmetric around the zero field, in contrast to the response obtained from a single vortex core. Finally, the collective response of the system for antiparallel core polarities is symmetric around zero bias. Finally, the vortex core whose polarization is opposite to the bias field dominates the response.

Authors:
 [1];  [1];  [1];  [1];  [1]
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  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1357468
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 104; Journal Issue: 8; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Rotating flows; Vortex dynamics; Polarization; Magnetization dynamics; Ground states

Citation Formats

Jain, Shikha, Novosad, Valentyn, Fradin, Frank Y., Pearson, John E., and Bader, Samuel D. Dynamics of coupled vortices in perpendicular field. United States: N. p., 2014. Web. doi:10.1063/1.4866900.
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Jain, Shikha, Novosad, Valentyn, Fradin, Frank Y., Pearson, John E., & Bader, Samuel D. Dynamics of coupled vortices in perpendicular field. United States. https://doi.org/10.1063/1.4866900
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Jain, Shikha, Novosad, Valentyn, Fradin, Frank Y., Pearson, John E., and Bader, Samuel D. Thu . "Dynamics of coupled vortices in perpendicular field". United States. https://doi.org/10.1063/1.4866900. https://www.osti.gov/servlets/purl/1357468.
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@article{osti_1357468,
title = {Dynamics of coupled vortices in perpendicular field},
author = {Jain, Shikha and Novosad, Valentyn and Fradin, Frank Y. and Pearson, John E. and Bader, Samuel D.},
abstractNote = {In this paper, we explore the coupling mechanism of two magnetic vortices in the presence of a perpendicular bias field by pre-selecting the polarity combinations using the resonant-spin-ordering approach. First, out of the four vortex polarity combinations (two of which are degenerate), three stable core polarity states are achieved by lifting the degeneracy of one of the states. Second, the response of the stiffness constant for the vortex pair (similar polarity) in perpendicular bias is found to be asymmetric around the zero field, in contrast to the response obtained from a single vortex core. Finally, the collective response of the system for antiparallel core polarities is symmetric around zero bias. Finally, the vortex core whose polarization is opposite to the bias field dominates the response.},
doi = {10.1063/1.4866900},
journal = {Applied Physics Letters},
number = 8,
volume = 104,
place = {United States},
year = {Thu Feb 27 00:00:00 EST 2014},
month = {Thu Feb 27 00:00:00 EST 2014}
}
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https://doi.org/10.1063/1.4866900
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    Works referencing / citing this record:

    Selective control of vortex polarities by microwave field in two robustly synchronized spin-torque nano-oscillators
    journal, January 2018

    • Li, Yi; de Milly, Xavier; Klein, Olivier
    • Applied Physics Letters, Vol. 112, Issue 2
    • DOI: 10.1063/1.5012768
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