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Title: Ballistic rectification of vortex domain wall chirality at nanowire corners

Abstract

The interactions of vortex domain walls with corners in planar magnetic nanowires are probed using magnetic soft X-ray transmission microscopy. Here,we show that when the domain walls are propagated into sharp corners using applied magnetic fields above a critical value, their chiralities are rectified to either clockwise or anticlockwise circulation depending on whether the corners turn left or right. Single-shot focused magneto-optic Kerr effect measurements are then used to demonstrate how, when combined with modes of domain propagation that conserve vortex chirality, this allows us to dramatically reduce the stochasticity of domain pinning at artificial defect sites. In conclusion, our results provide a tool for controlling domain wall chirality and pinning behavior both in further experimental studies and in future domain wall-based memory, logic and sensor technologies.

Authors:
 [1];  [1]; ORCiD logo [1];  [1];  [2]; ORCiD logo [2];  [3];  [4];  [1]
+ Show Author Affiliations
  1. Univ. of Sheffield (United Kingdom)
  2. Univ. of Leeds (United Kingdom)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Daegu Gyeongbuk Institute of Science and Technology (South Korea)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Santa Cruz, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1530211
Alternate Identifier(s):
OSTI ID: 1227590
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 107; 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; 42 ENGINEERING

Citation Formats

Omari, K., Bradley, R. C., Broomhall, T. J., Hodges, M. P. P., Rosamond, M. C., Linfield, E. H., Im, M. -Y., Fischer, P., and Hayward, T. J. Ballistic rectification of vortex domain wall chirality at nanowire corners. United States: N. p., 2015. Web. doi:10.1063/1.4936565.
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Omari, K., Bradley, R. C., Broomhall, T. J., Hodges, M. P. P., Rosamond, M. C., Linfield, E. H., Im, M. -Y., Fischer, P., & Hayward, T. J. Ballistic rectification of vortex domain wall chirality at nanowire corners. United States. https://doi.org/10.1063/1.4936565
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Omari, K., Bradley, R. C., Broomhall, T. J., Hodges, M. P. P., Rosamond, M. C., Linfield, E. H., Im, M. -Y., Fischer, P., and Hayward, T. J. Wed . "Ballistic rectification of vortex domain wall chirality at nanowire corners". United States. https://doi.org/10.1063/1.4936565. https://www.osti.gov/servlets/purl/1530211.
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@article{osti_1530211,
title = {Ballistic rectification of vortex domain wall chirality at nanowire corners},
author = {Omari, K. and Bradley, R. C. and Broomhall, T. J. and Hodges, M. P. P. and Rosamond, M. C. and Linfield, E. H. and Im, M. -Y. and Fischer, P. and Hayward, T. J.},
abstractNote = {The interactions of vortex domain walls with corners in planar magnetic nanowires are probed using magnetic soft X-ray transmission microscopy. Here,we show that when the domain walls are propagated into sharp corners using applied magnetic fields above a critical value, their chiralities are rectified to either clockwise or anticlockwise circulation depending on whether the corners turn left or right. Single-shot focused magneto-optic Kerr effect measurements are then used to demonstrate how, when combined with modes of domain propagation that conserve vortex chirality, this allows us to dramatically reduce the stochasticity of domain pinning at artificial defect sites. In conclusion, our results provide a tool for controlling domain wall chirality and pinning behavior both in further experimental studies and in future domain wall-based memory, logic and sensor technologies.},
doi = {10.1063/1.4936565},
journal = {Applied Physics Letters},
number = 22,
volume = 107,
place = {United States},
year = {Wed Dec 02 00:00:00 EST 2015},
month = {Wed Dec 02 00:00:00 EST 2015}
}
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Publisher's Version of Record
https://doi.org/10.1063/1.4936565
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Cited by: 12 works
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Works referenced in this record:

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    Works referencing / citing this record:

    Toward Chirality‐Encoded Domain Wall Logic
    journal, March 2019

    • Omari, Khalid A.; Broomhall, Thomas J.; Dawidek, Richard W. S.
    • Advanced Functional Materials, Vol. 29, Issue 10
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    A Micromagnetic Protocol for Qualitatively Predicting Stochastic Domain Wall Pinning
    journal, December 2017

    Magnetoresistance effect in permalloy nanowires with various types of notches
    journal, May 2018

    Fast micromagnetic simulations on GPU—recent advances made with $\mathsf{mumax}^3$
    journal, February 2018

    • Leliaert, J.; Dvornik, M.; Mulkers, J.
    • Journal of Physics D: Applied Physics, Vol. 51, Issue 12
    • DOI: 10.1088/1361-6463/aaab1c

    Deterministic control of magnetic vortex wall chirality by electric field
    journal, August 2017

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