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Browse Journals & Magazines > Applied Physics Letters ...> Volume:89 Issue:8 Help

Epitaxial growth of room-temperature ferrimagnetic semiconductor thin films based on the ilmenite-hematite solid solution

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4 Author(s)
Hojo, Hajime ; Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan ; Fujita, Koji ; Tanaka, Katsuhisa ; Hirao, Kazuyuki

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Epitaxial thin films composed of 0.7FeTiO3∙0.3Fe2O3 solid solution have been prepared on α-Al2O3 (0001) substrates by a pulsed laser deposition method, and their electrical and magnetic properties have been examined. A single phase of the ordered phase can be obtained under limited deposition conditions: oxygen partial pressure of 1.0×10-3 Pa and substrate temperature of 600–700 °C. The as-deposited film is semiconducting and ferrimagnetic below room temperature, while subsequent annealing in vacuum leads to the Curie temperature above room temperature. On the other hand, the thin films with the disordered phase appear to be antiferromagnetic and also insulating.

Published in:
Applied Physics Letters  (Volume:89 ,  Issue: 8 )

Date of Publication: Aug 2006

Page(s):
082509 - 082509-3
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.2337276
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Aug 2006

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