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Robust Ferromagnetism in Highly Strained SrCoO3 Thin Films

Wang, Yujia; He, Qing; Ming, Wenmei; Du, Mao-Hua; Lu, Nianpeng; Cafolla, Clodomiro; Fujioka, Jun; Zhang, Qinghua; Zhang, Ding; Shen, Shengchun; Lyu, Yingjie; N’Diaye, Alpha T.; Arenholz, Elke; Gu, Lin; Nan, Cewen; Tokura, Yoshinori; Okamoto, Satoshi; Yu, Pu

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Authors

Yujia Wang

Qing He

Wenmei Ming

Mao-Hua Du

Nianpeng Lu

Dr Miro Cafolla clodomiro.cafolla@durham.ac.uk
Addison Wheeler Research Fellow

Jun Fujioka

Qinghua Zhang

Ding Zhang

Shengchun Shen

Yingjie Lyu

Alpha T. N’Diaye

Elke Arenholz

Lin Gu

Cewen Nan

Yoshinori Tokura

Satoshi Okamoto

Pu Yu



Abstract

Epitaxial strain provides important pathways to control the magnetic and electronic states in transition-metal oxides. However, the large strain is usually accompanied by a strong reduction of the oxygen-vacancy formation energy, which hinders the direct manipulation of their intrinsic properties. Here, using a postdeposition ozone annealing method, we obtain a series of oxygen stoichiometric SrCoO3 thin films with the tensile strain up to 3.0%. We observe a robust ferromagnetic ground state in all strained thin films, while interestingly the tensile strain triggers a distinct metal-to-insulator transition along with the increase of the tensile strain. The persistent ferromagnetic state across the electrical transition therefore suggests that the magnetic state is directly correlated with the localized electrons, rather than the itinerant ones, which then calls for further investigation of the intrinsic mechanism of this magnetic compound beyond the double-exchange mechanism.

Citation

Wang, Y., He, Q., Ming, W., Du, M., Lu, N., Cafolla, C., …Yu, P. (2020). Robust Ferromagnetism in Highly Strained SrCoO3 Thin Films. Physical Review X, 10(2), Article 10.021030. https://doi.org/10.1103/physrevx.10.021030

Journal Article Type Article
Acceptance Date Feb 27, 2020
Online Publication Date May 7, 2020
Publication Date Apr 30, 2020
Deposit Date May 10, 2020
Publicly Available Date May 11, 2020
Journal Physical Review X
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 10
Issue 2
Article Number 10.021030
DOI https://doi.org/10.1103/physrevx.10.021030

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Copyright Statement
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.





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