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Title: Domain wall diode based on functionally graded Dzyaloshinskii–Moriya interaction

Abstract

In this work, we present a general approach for studying the dynamics of domain walls in biaxial ferromagnetic stripes with functionally graded Dzyaloshinskii–Moriya interaction (DMI). By engineering the spatial profile of the DMI parameter we propose the concept of a diode, which implements filtering of domain walls of certain topological charge and helicity. We base our study on phenomenological Landau–Lifshitz–Gilbert equations with additional Zhang–Li spin-transfer terms using a collective variable approach. In the effective equations of motion the gradients of DMI play the role of a driving force which competes with current driving. All analytical predictions are confirmed by numerical simulations.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [4]; ORCiD logo [5]
  1. National Academy of Sciences of Ukraine (NASU), Kiev (Ukraine); Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany)
  2. National Academy of Sciences of Ukraine (NASU), Kiev (Ukraine); Karlsruhe Inst. of Technology (KIT) (Germany)
  3. Taras Shevchenko National Univ. of Kyiv (Ukraine)
  4. Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany); Dresden Univ. of Technology (Germany)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); German Federal Ministry of Education and Research (BMBF); German Research Foundation (DFG); National Academy of Sciences of Ukraine; Taras Shevchenko National Univ. of Kyiv
OSTI Identifier:
1814779
Report Number(s):
LA-UR-20-22584
Journal ID: ISSN 0003-6951; TRN: US2213885
Grant/Contract Number:  
89233218CNA000001; 01DK18002; 39085490; 0116U003192; 19BF052-01
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 116; Journal Issue: 22; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Material Science

Citation Formats

Yershov, Kostiantyn V., Kravchuk, Volodymyr P., Sheka, Denis D., van den Brink, Jeroen, and Saxena, Avadh Behari. Domain wall diode based on functionally graded Dzyaloshinskii–Moriya interaction. United States: N. p., 2020. Web. doi:10.1063/5.0010107.
Yershov, Kostiantyn V., Kravchuk, Volodymyr P., Sheka, Denis D., van den Brink, Jeroen, & Saxena, Avadh Behari. Domain wall diode based on functionally graded Dzyaloshinskii–Moriya interaction. United States. https://doi.org/10.1063/5.0010107
Yershov, Kostiantyn V., Kravchuk, Volodymyr P., Sheka, Denis D., van den Brink, Jeroen, and Saxena, Avadh Behari. Fri . "Domain wall diode based on functionally graded Dzyaloshinskii–Moriya interaction". United States. https://doi.org/10.1063/5.0010107. https://www.osti.gov/servlets/purl/1814779.
@article{osti_1814779,
title = {Domain wall diode based on functionally graded Dzyaloshinskii–Moriya interaction},
author = {Yershov, Kostiantyn V. and Kravchuk, Volodymyr P. and Sheka, Denis D. and van den Brink, Jeroen and Saxena, Avadh Behari},
abstractNote = {In this work, we present a general approach for studying the dynamics of domain walls in biaxial ferromagnetic stripes with functionally graded Dzyaloshinskii–Moriya interaction (DMI). By engineering the spatial profile of the DMI parameter we propose the concept of a diode, which implements filtering of domain walls of certain topological charge and helicity. We base our study on phenomenological Landau–Lifshitz–Gilbert equations with additional Zhang–Li spin-transfer terms using a collective variable approach. In the effective equations of motion the gradients of DMI play the role of a driving force which competes with current driving. All analytical predictions are confirmed by numerical simulations.},
doi = {10.1063/5.0010107},
journal = {Applied Physics Letters},
number = 22,
volume = 116,
place = {United States},
year = {Fri Jun 05 00:00:00 EDT 2020},
month = {Fri Jun 05 00:00:00 EDT 2020}
}

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