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Oxygen vacancy enhanced room-temperature ferromagnetism in Sr3SnO/c-YSZ/Si (001) heterostructures

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Abstract

The magnetic properties of Sr3SnO (SSO) epitaxial thin films prepared under various post-growth annealing treatments are reported. The SSO films are grown on cubic yttria-stabilized zirconia Si (001) platform by pulsed laser deposition. Post-growth vacuum annealing is found to enhance the room-temperature ferromagnetism (RTFM), whereas oxygen annealing reduces it. The results are explained through the oxygen vacancy constituted bound magnetic polarons (BMP) model. An empirical relationship between the extracted BMP concentration and the oxygen vacancy concentration is shown using X-ray photoelectron spectroscopy data. The results indicate a promising way to tune RTFM by manipulating oxygen vacancies and related defects.

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Acknowledgments

The authors acknowledge the use of the Analytical Instrumentation Facility (AIF) at North Carolina State University, which is supported by the State of North Carolina and the National Science Foundation, and thank Dr. Srinivasa Rao Singamaneni for the stimulating scientific discussion and critical reading of the manuscript.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina, 27695-7907, USA

    Y. F. Lee, F. Wu, J. Narayan & J. Schwartz

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  1. Y. F. Lee
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  2. F. Wu
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  3. J. Narayan
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  4. J. Schwartz
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Correspondence to Y. F. Lee.

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For supplementary material for this article, please visit http://dx.doi.org/10.1557/mrc.2014.4

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Lee, Y.F., Wu, F., Narayan, J. et al. Oxygen vacancy enhanced room-temperature ferromagnetism in Sr3SnO/c-YSZ/Si (001) heterostructures. MRS Communications 4, 7–13 (2014). https://doi.org/10.1557/mrc.2014.4

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