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Title: Reversible control of magnetism in La0.67Sr0.33MnO3 through chemically-induced oxygen migration

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4942645· OSTI ID:1418493
 [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

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.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1418493
Journal Information:
Applied Physics Letters, Vol. 108, Issue 8; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 30 works
Citation information provided by
Web of Science

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Cited By (9)

Voltage‐Control of Magnetism in All‐Solid‐State and Solid/Liquid Magnetoelectric Composites journal February 2019
Engineering Oxygen Migration for Homogeneous Volume Resistive Switching in 3‐Terminal Devices journal November 2018
Peroxide Yield of the (001) La 0.6 Sr 0.4 MnO 3 Surface as a Bifunctional Electrocatalyst for the Oxygen Reduction Reaction and Oxygen Evolution Reaction in Alkaline Media journal January 2019
Tunable Magnetism in Nanoporous CuNi Alloys by Reversible Voltage-Driven Element-Selective Redox Processes journal April 2018
Magneto-ionic control of magnetism using a solid-state proton pump journal November 2018
Electrolyte-gated magnetoelectric actuation: Phenomenology, materials, mechanisms, and prospective applications journal March 2019
Effect of oxygen stoichiometry on the magnetization profiles and negative magnetization in LSMO thin films journal September 2019
Superconductivity-driven negative interfacial magnetization in YBa 2 Cu 3 O 7−δ /SrTiO 3 /La 0.67 Sr 0.33 MnO 3 heterostructures journal January 2020
Voltage-Control of Magnetism in All-Solid-State and Solid/Liquid Magnetoelectric Composites text January 2019

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