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Title: Reversible control of magnetism in La 0.67Sr 0.33MnO 3 through chemically-induced oxygen migration

Abstract

We demonstrate reversible control of magnetization and anisotropy in La 0.67Sr 0.33MnO 3 films through interfacial oxygen migration. Gd metal capping layers deposited onto La 0.67Sr 0.33MnO 3 leach oxygen from the film through a solid-state redox reaction to form porous Gd 2O 3. X-ray absorption and polarized neutron reflectometry measurements show Mn valence alterations consistent with high oxygen vacancy concentrations, resulting in suppressed magnetization and increased coercive fields. Effects of the oxygen migration are observed both at the interface and also throughout the majority of a 40 nm thick film, suggesting extensive diffusion of oxygen vacancies. After Gd-capped La 0.67Sr 0.33MnO 3 is exposed to atmospheric oxygen for a prolonged period of time, oxygen diffuses through the Gd 2O 3 layer and the magnetization of the La 0.67Sr 0.33MnO 3 returns to the uncapped value. In conclusion, these findings showcase perovskite heterostructures as ideal candidates for developing functional interfaces through chemically-induced oxygen migration.

Authors:
 [1]; ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [1];  [1];  [4]; ORCiD logo [5];  [1]
  1. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  2. Stanford Univ., CA (United States). Dept. of Materials Science and Engineering; Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  4. Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials; Stanford Univ., CA (United States). Dept. of Applied Physics
  5. Univ. of California, Davis, CA (United States). Dept. of Physics
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1418493
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 108; Journal Issue: 8; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Grutter, A. J., Gilbert, D. A., Alaan, U. S., Arenholz, E., Maranville, B. B., Borchers, J. A., Suzuki, Y., Liu, Kai, and Kirby, B. J. Reversible control of magnetism in La0.67Sr0.33MnO3 through chemically-induced oxygen migration. United States: N. p., 2016. Web. doi:10.1063/1.4942645.
Grutter, A. J., Gilbert, D. A., Alaan, U. S., Arenholz, E., Maranville, B. B., Borchers, J. A., Suzuki, Y., Liu, Kai, & Kirby, B. J. Reversible control of magnetism in La0.67Sr0.33MnO3 through chemically-induced oxygen migration. United States. doi:10.1063/1.4942645.
Grutter, A. J., Gilbert, D. A., Alaan, U. S., Arenholz, E., Maranville, B. B., Borchers, J. A., Suzuki, Y., Liu, Kai, and Kirby, B. J. Mon . "Reversible control of magnetism in La0.67Sr0.33MnO3 through chemically-induced oxygen migration". United States. doi:10.1063/1.4942645. https://www.osti.gov/servlets/purl/1418493.
@article{osti_1418493,
title = {Reversible control of magnetism in La0.67Sr0.33MnO3 through chemically-induced oxygen migration},
author = {Grutter, A. J. and Gilbert, D. A. and Alaan, U. S. and Arenholz, E. and Maranville, B. B. and Borchers, J. A. and Suzuki, Y. and Liu, Kai and Kirby, B. J.},
abstractNote = {We demonstrate reversible control of magnetization and anisotropy in La0.67Sr0.33MnO3 films through interfacial oxygen migration. Gd metal capping layers deposited onto La0.67Sr0.33MnO3 leach oxygen from the film through a solid-state redox reaction to form porous Gd2O3. X-ray absorption and polarized neutron reflectometry measurements show Mn valence alterations consistent with high oxygen vacancy concentrations, resulting in suppressed magnetization and increased coercive fields. Effects of the oxygen migration are observed both at the interface and also throughout the majority of a 40 nm thick film, suggesting extensive diffusion of oxygen vacancies. After Gd-capped La0.67Sr0.33MnO3 is exposed to atmospheric oxygen for a prolonged period of time, oxygen diffuses through the Gd2O3 layer and the magnetization of the La0.67Sr0.33MnO3 returns to the uncapped value. In conclusion, these findings showcase perovskite heterostructures as ideal candidates for developing functional interfaces through chemically-induced oxygen migration.},
doi = {10.1063/1.4942645},
journal = {Applied Physics Letters},
number = 8,
volume = 108,
place = {United States},
year = {2016},
month = {2}
}

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    Works referencing / citing this record:

    Voltage‐Control of Magnetism in All‐Solid‐State and Solid/Liquid Magnetoelectric Composites
    journal, February 2019