Controlling the switching field in nanomagnets by means of domain-engineered antiferromagnets

Folven, Eric; Linder, J.; Gomonay, O. V.; Scholl, Andreas; Doran, A.; Young, A. T.; Retterer, Scott T.; Malik, V. K.; Tybell, Thomas; Takamura, Yayoi; Grepstad, Jostein K.

doi:10.1103/PhysRevB.92.094421

Title: Controlling the switching field in nanomagnets by means of domain-engineered antiferromagnets

Journal Article · Mon Sep 14 04:00:00 UTC 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI: https://doi.org/10.1103/PhysRevB.92.094421 · OSTI ID:1265918

Folven, Eric ^[1]; Linder, J. ^[1]; Gomonay, O. V. ^[2]; Scholl, Andreas ^[3]; Doran, A. ^[3]; Young, A. T. ^[3]; Retterer, Scott T. ^[4]; Malik, V. K. ^[5]; Tybell, Thomas ^[1]; Takamura, Yayoi ^[5]; Grepstad, Jostein K. ^[1]

Norwegian Univ. of Science and Technology, Trondheim (Norway)
National Technical Univ. of Ukraine, Kyiv (Ukraine)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of California, Davis, CA (United States)

Using soft x-ray spectromicroscopy, we investigate the magnetic domain structure in embedded nanomagnets defined in La_0.7Sr_0.3MnO₃ thin films and LaFeO₃/La_0.7Sr_0.3MnO₃ bilayers. We find that shape-controlled antiferromagnetic domain states give rise to a significant reduction of the switching field of the rectangular nanomagnets. This is discussed within the framework of competition between an intrinsic spin-flop coupling and shape anisotropy. In conclusion, the data demonstrates that shape effects in antiferromagnets may be used to control the magnetic properties in nanomagnets.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1265918

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 9 Vol. 92; ISSN 1098-0121

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Shape-imposed anisotropy in antiferromagnetic complex oxide nanostructures Bang, A. D.; Hallsteinsen, I.; Chopdekar, R. V. Applied Physics Letters, Vol. 115, Issue 11 https://doi.org/10.1063/1.5116806	journal	September 2019
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Temperature dependence of ferromagnet-antiferromagnet spin alignment and coercivity in epitaxial micromagnet bilayers Lee, Michael S.; Wynn, Thomas A.; Folven, Erik Physical Review Materials, Vol. 1, Issue 1 https://doi.org/10.1103/physrevmaterials.1.014402	journal	June 2017

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