Magnetism in epitaxial PrCoO3 and Pr0.7Y0.3CoO3 thin films

Ted D. Sanders; Urusa S. Alaan; Matthew T. Gray; Shameek Bose; Matthew Taylor; Mariona Cabero; Virat Mehta; Maria Varela; Chris Leighton; Yuri Suzuki

doi:10.1016/j.jmmm.2017.11.127

Magnetism in epitaxial PrCoO₃ and Pr_0.7Y_0.3CoO₃ thin films

Ted D. Sanders, Urusa S. Alaan, Matthew T. Gray, Shameek Bose, Matthew Taylor, Mariona Cabero, Virat Mehta, Maria Varela, Chris Leighton, Yuri Suzuki

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Lattice distortions can stabilize magnetic ground states not observed in the bulk for thin films of undoped cobalt perovskites ACoO₃. We have found that lattice distortions, in the form of tensile epitaxial strain, can stabilize a ferromagnetic ground state in PrCoO₃ thin films below 65 K. However, in Pr_0.7Y_0.3CoO₃, which has a smaller unit cell, similar levels of tensile strain are insufficient to induce ferromagnetism. These results indicate the importance of A-site cation choice for Co spin-state and Co-O-Co exchange interactions, offering another dimension to tune magnetic order in thin film cobalt perovskites.

Original language	English (US)
Pages (from-to)	654-659
Number of pages	6
Journal	Journal of Magnetism and Magnetic Materials
Volume	451
DOIs	https://doi.org/10.1016/j.jmmm.2017.11.127
State	Published - Apr 1 2018

Bibliographical note

Publisher Copyright:
© 2017 Elsevier B.V.

Keywords

Chemical pressure
Cobaltites
Epitaxial oxide thin films
Epitaxial strain

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abstract = "Lattice distortions can stabilize magnetic ground states not observed in the bulk for thin films of undoped cobalt perovskites ACoO3. We have found that lattice distortions, in the form of tensile epitaxial strain, can stabilize a ferromagnetic ground state in PrCoO3 thin films below 65 K. However, in Pr0.7Y0.3CoO3, which has a smaller unit cell, similar levels of tensile strain are insufficient to induce ferromagnetism. These results indicate the importance of A-site cation choice for Co spin-state and Co-O-Co exchange interactions, offering another dimension to tune magnetic order in thin film cobalt perovskites.",

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AU - Sanders, Ted D.

AU - Alaan, Urusa S.

AU - Gray, Matthew T.

AU - Bose, Shameek

AU - Taylor, Matthew

AU - Cabero, Mariona

AU - Mehta, Virat

AU - Varela, Maria

AU - Leighton, Chris

AU - Suzuki, Yuri

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AB - Lattice distortions can stabilize magnetic ground states not observed in the bulk for thin films of undoped cobalt perovskites ACoO3. We have found that lattice distortions, in the form of tensile epitaxial strain, can stabilize a ferromagnetic ground state in PrCoO3 thin films below 65 K. However, in Pr0.7Y0.3CoO3, which has a smaller unit cell, similar levels of tensile strain are insufficient to induce ferromagnetism. These results indicate the importance of A-site cation choice for Co spin-state and Co-O-Co exchange interactions, offering another dimension to tune magnetic order in thin film cobalt perovskites.

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