Magnetism and Faraday Rotation in Oxygen-Deficient Polycrystalline and Single-Crystal Iron-Substituted Strontium Titanate
Name
PhysRevApplied.7.024006.pdf
Size
4.31 MB
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Checksum (MD5)
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Author(s)
Goto, Taichi
Kim, Dong Hun
Sun, Xueyin
Florez, Juan M.
Ong, Shyue Ping
Vargas, Patricio
Ackland, Karl
Stamenov, Plamen
Inoue, Mitsuteru
Coey, J. Michael D.
Date Issued
February 2017
Journal
Physical Review Applied
Publisher
American Physical Society
Citation
Goto, Taichi et al. “Magnetism and Faraday Rotation in Oxygen-Deficient Polycrystalline and Single-Crystal Iron-Substituted Strontium Titanate.” Physical Review Applied 7.2 (2017): n. pag. © 2017 American Physical Society
Version
Final published version
Abstract
Both polycrystalline and single-crystal films of iron-substituted strontium titanate, Sr(Ti[subscript 0.65]Fe[subscript 0.35])O[subscript 3−δ], prepared by pulsed laser deposition, show room-temperature magnetism and Faraday rotation, with the polycrystalline films exhibiting higher saturation magnetization and Faraday rotation. The magnetic properties vary with the oxygen pressure at which the films are grown, showing a maximum at pressures of approximately 4 μ Torr at which the unit-cell volume is largest. The results are discussed in terms of the oxygen stoichiometry and corresponding Fe valence states, the structure and strain state, and the presence of small-volume fractions of metallic Fe in single-crystal films grown at the optimum deposition pressure. Integration of magneto-optical polycrystalline films on an optical-waveguide device demonstrates a nonreciprocal phase shift.
MIT Department
Lincoln Laboratory
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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DOI of Published Version
https://doi.org/10.1103/PhysRevApplied.7.024006
