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

Published online by Cambridge University Press:  28 January 2014

Y.F. Lee*
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina27695-7907
F. Wu
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina27695-7907
J. Narayan
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina27695-7907
J. Schwartz
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina27695-7907
*
Address all correspondence to Yi-Fang Lee atylee9@ncsu.edu
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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.

Type
Research Letters
Copyright
Copyright © Materials Research Society 2014 

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