ID | 32959 |
FullText URL | |
Author |
Takada, Y.
Nakanishi, M.
Fujii, T.
Takada, J.
Muraoka, Y.
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Abstract | An ilmenite-hematite solid solution ( Fe2-xTixO3 ) is one of the candidates for practical magnetic semiconductors with a high Curie temperature. We have prepared well-crystallized epitaxial Fe2-xTixO3 films with a wide range of Ti concentrations - x=0.50, 0.60, 0.65, 0.76, 0.87, and 0.94 - on α-Al2O3(001) substrates. The films are prepared by a reactive helicon plasma sputtering technique to evaporate Fe and TiO targets simultaneously under optimized oxygen pressure conditions. The structural characterizations of the films reveal that all films have a single phase of the ordered structure with R3 symmetry, where Ti-rich and Fe-rich layers are stacked alternately along the c axis. All films have large ferrimagnetic moments at low temperature, and room temperature magnetization is clearly observed at x<0.7. The inverse temperature dependence of the resistivities of the films indicates their semiconducting behavior. The film resistivities decrease with decreasing Ti concentration. |
Note | Published with permission from the copyright holder.
This is a author's copy,as published in Journal of Applied Physics , 2008, volume 104, issue 3, Article Number: 033713. Publisher URL: http://dx.doi.org/10.1063/1.2966298 Direct Access to Web of Science Copyright © 2008 American Institute of Physics All rights reserved. |
Published Date | 2008-08-13
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Publication Title |
Journal of Applied Physics
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Volume | volume104
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Issue | issue3
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Content Type |
Journal Article
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language |
English
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Refereed |
True
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DOI | |
Web of Science KeyUT | |
Submission Path | applied_physics/1
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