Controlling magnetism and transport at perovskite cobaltite interfaces via strain-tuned oxygen vacancy ordering
Perovskite cobaltite films and interfaces are of interest for a wide variety of reasons and applications, including magnetism. One fascinating aspect of such materials is their tendency to form ordered arrangements of oxygen vacancies. Here, the authors demonstrate that the ordering of oxygen vacancies in prototypical La${}_{1\ensuremath{-}x}$Sr${}_{x}$CoO${}_{3\ensuremath{-}\ensuremath{\delta}}$ can be precisely controlled through both heteroepitaxial strain and growth orientation. This in turn controls the oxygen vacancy depth profile, with profound consequences for electronic and magnetic behavior. In particular, dead layer effects can be effectively mitigated via this approach, enabling bulk-like metallic and ferromagnetic properties at few-unit-cell thicknesses.
Authors
- Mikhail Zhernenkov (ORCID: https://orcid.org/0000-0003-3604-0672)
- Josh Schmitt
- Ondřej Hovorka (ORCID: https://orcid.org/0000-0002-6707-4325)
- Haile Ambaye (ORCID: https://orcid.org/0000-0002-8122-9952)
- Shameek Bose
- Jaume Gàzquez (ORCID: https://orcid.org/0000-0002-2561-328X)
- Nileena Nandakumaran (ORCID: https://orcid.org/0000-0003-3647-4008)
- M. Varela (ORCID: https://orcid.org/0000-0002-6582-7004)
- Manish Sharma (ORCID: https://orcid.org/0000-0002-7809-0064)
- Andrew Berger (ORCID: https://orcid.org/0000-0001-5865-6609)
- M. R. Fitzsimmons (ORCID: https://orcid.org/0000-0001-6204-5480)
- Valeria Lauter (ORCID: https://orcid.org/0000-0003-0989-6563)
- John E. Dewey (ORCID: https://orcid.org/0000-0002-8024-9783)
- Jeff Walter (ORCID: https://orcid.org/0000-0001-9450-0388)
- Chris Leighton (ORCID: https://orcid.org/0000-0003-2492-0816)
- M. A. Torija
Institutions
- Universidad Complutense de Madrid (ES)
- Oak Ridge National Laboratory (US)
- University of Minnesota (US)
- Seagate (United States) (US)
- Los Alamos National Laboratory (US)
- University of Minnesota System (US)
- CIC nanoGUNE (ES)
- Institut de Ciència de Materials de Barcelona (ES)
- University of Southampton (GB)
Publication Details
- Journal
- Physical Review Materials
- Published
- 2025-03-28
- DOI
- https://doi.org/10.1103/physrevmaterials.9.l031402
- Citations
- 2
- Primary Topic
- Magnetic and transport properties of perovskites and related materials
- Type
- article
- Field-Weighted Citation Impact
- 0.85
Funders
- National Science Foundation
- U.S. Department of Energy
- University of Minnesota
- Ministerio de Ciencia e Innovación
- Office of Science
- Basic Energy Sciences
- Materials Research Science and Engineering Center, University of California, San Diego
- Oak Ridge National Laboratory
- Los Alamos National Laboratory