Perpendicular magnetic anisotropy via strain-engineered oxygen vacancy ordering in epitaxial L a1-x S rxCo O 3

Jeff Walter, Shameek Bose, Mariona Cabero, Guichuan Yu, Martin Greven, Maria Varela, Chris Leighton

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Tuning oxygen vacancy concentrations is a well-established approach to controlling properties of complex oxides. Recent work on perovskite cobaltites has shown that ordering of oxygen vacancies can also be tuned, via heteroepitaxial strain, presenting new opportunities. Here we demonstrate that strain-engineered vacancy ordering can control and enhance magnetic anisotropy in La1-xSrxCoO3-δ. In particular, in-plane oxygen vacancy order induced by compressive strain is shown to result in remarkably strong perpendicular magnetic anisotropy, with anisotropy constant up to 6×106erg/cm3. The anisotropy is thickness independent, ruling out surface and film/substrate interface anisotropy, but strongly correlated with lateral coherence of defect order from electron microscopy. The results are discussed in terms of the unit-cell-level superlattice induced by the oxygen vacancy order, generating intriguing analogies with metal-based multilayer systems. Generally, this Rapid Communication highlights the significant potential of strain-based manipulation of oxygen vacancy ordering to control and enhance complex oxide properties.

Original languageEnglish (US)
Article number111404
JournalPhysical Review Materials
Volume2
Issue number11
DOIs
StatePublished - Nov 19 2018

Fingerprint

Magnetic anisotropy
Oxygen vacancies
anisotropy
oxygen
Anisotropy
Oxides
oxides
Perovskite
Electron microscopy
Vacancies
Multilayers
Tuning
Metals
manipulators
electron microscopy
communication
Defects
tuning
Communication
Substrates

How much support was provided by MRSEC?

  • Shared

Reporting period for MRSEC

  • Period 5

Cite this

Perpendicular magnetic anisotropy via strain-engineered oxygen vacancy ordering in epitaxial L a1-x S rxCo O 3 -δ . / Walter, Jeff; Bose, Shameek; Cabero, Mariona; Yu, Guichuan; Greven, Martin; Varela, Maria; Leighton, Chris.

In: Physical Review Materials, Vol. 2, No. 11, 111404, 19.11.2018.

Research output: Contribution to journalArticle

@article{2830f2159442488cbfc702990a56bfdc,
title = "Perpendicular magnetic anisotropy via strain-engineered oxygen vacancy ordering in epitaxial L a1-x S rxCo O 3 -δ",
abstract = "Tuning oxygen vacancy concentrations is a well-established approach to controlling properties of complex oxides. Recent work on perovskite cobaltites has shown that ordering of oxygen vacancies can also be tuned, via heteroepitaxial strain, presenting new opportunities. Here we demonstrate that strain-engineered vacancy ordering can control and enhance magnetic anisotropy in La1-xSrxCoO3-δ. In particular, in-plane oxygen vacancy order induced by compressive strain is shown to result in remarkably strong perpendicular magnetic anisotropy, with anisotropy constant up to 6×106erg/cm3. The anisotropy is thickness independent, ruling out surface and film/substrate interface anisotropy, but strongly correlated with lateral coherence of defect order from electron microscopy. The results are discussed in terms of the unit-cell-level superlattice induced by the oxygen vacancy order, generating intriguing analogies with metal-based multilayer systems. Generally, this Rapid Communication highlights the significant potential of strain-based manipulation of oxygen vacancy ordering to control and enhance complex oxide properties.",
author = "Jeff Walter and Shameek Bose and Mariona Cabero and Guichuan Yu and Martin Greven and Maria Varela and Chris Leighton",
year = "2018",
month = "11",
day = "19",
doi = "10.1103/PhysRevMaterials.2.111404",
language = "English (US)",
volume = "2",
journal = "Physical Review Materials",
issn = "2475-9953",
publisher = "American Physical Society",
number = "11",

}

TY - JOUR

T1 - Perpendicular magnetic anisotropy via strain-engineered oxygen vacancy ordering in epitaxial L a1-x S rxCo O 3 -δ

AU - Walter, Jeff

AU - Bose, Shameek

AU - Cabero, Mariona

AU - Yu, Guichuan

AU - Greven, Martin

AU - Varela, Maria

AU - Leighton, Chris

PY - 2018/11/19

Y1 - 2018/11/19

N2 - Tuning oxygen vacancy concentrations is a well-established approach to controlling properties of complex oxides. Recent work on perovskite cobaltites has shown that ordering of oxygen vacancies can also be tuned, via heteroepitaxial strain, presenting new opportunities. Here we demonstrate that strain-engineered vacancy ordering can control and enhance magnetic anisotropy in La1-xSrxCoO3-δ. In particular, in-plane oxygen vacancy order induced by compressive strain is shown to result in remarkably strong perpendicular magnetic anisotropy, with anisotropy constant up to 6×106erg/cm3. The anisotropy is thickness independent, ruling out surface and film/substrate interface anisotropy, but strongly correlated with lateral coherence of defect order from electron microscopy. The results are discussed in terms of the unit-cell-level superlattice induced by the oxygen vacancy order, generating intriguing analogies with metal-based multilayer systems. Generally, this Rapid Communication highlights the significant potential of strain-based manipulation of oxygen vacancy ordering to control and enhance complex oxide properties.

AB - Tuning oxygen vacancy concentrations is a well-established approach to controlling properties of complex oxides. Recent work on perovskite cobaltites has shown that ordering of oxygen vacancies can also be tuned, via heteroepitaxial strain, presenting new opportunities. Here we demonstrate that strain-engineered vacancy ordering can control and enhance magnetic anisotropy in La1-xSrxCoO3-δ. In particular, in-plane oxygen vacancy order induced by compressive strain is shown to result in remarkably strong perpendicular magnetic anisotropy, with anisotropy constant up to 6×106erg/cm3. The anisotropy is thickness independent, ruling out surface and film/substrate interface anisotropy, but strongly correlated with lateral coherence of defect order from electron microscopy. The results are discussed in terms of the unit-cell-level superlattice induced by the oxygen vacancy order, generating intriguing analogies with metal-based multilayer systems. Generally, this Rapid Communication highlights the significant potential of strain-based manipulation of oxygen vacancy ordering to control and enhance complex oxide properties.

UR - http://www.scopus.com/inward/record.url?scp=85060606814&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85060606814&partnerID=8YFLogxK

U2 - 10.1103/PhysRevMaterials.2.111404

DO - 10.1103/PhysRevMaterials.2.111404

M3 - Article

AN - SCOPUS:85060606814

VL - 2

JO - Physical Review Materials

JF - Physical Review Materials

SN - 2475-9953

IS - 11

M1 - 111404

ER -