Grain boundary ferromagnetism in vanadium-doped In sub( 2)O sub( 3) thin films

Room temperature ferromagnetism was observed in In sub( 2)O sub( 3) thin films doped with 5 at .% V, prepared by pulsed-laser deposition at substrate temperatures ranging from 300 degree Celsius to 600 degree Celsius. X-ray absorption fine-structure measurement indicated that V was substitutionally...

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Published inEurophysics letters Vol. 103; no. 6; p. 1
Main Authors Feng, Qi, Blythe, Harry J, Fox, A Mark, Qin, Xiu-Fang, Xu, Xiao-Hong, Heald, Steve M, Gehring, Gillian A
Format Journal Article
LanguageEnglish
Published 01.09.2013
Subjects
Deposition
Ferromagnetism
Grain boundaries
Grains
Magnetization
Phases
Thin films
X-rays
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Summary:Room temperature ferromagnetism was observed in In sub( 2)O sub( 3) thin films doped with 5 at .% V, prepared by pulsed-laser deposition at substrate temperatures ranging from 300 degree Celsius to 600 degree Celsius. X-ray absorption fine-structure measurement indicated that V was substitutionally dissolved in the In sub( 2)O sub( 3) host lattice, thus excluding the existence of secondary phases of V compounds. Magnetic measurements based on SQUID magnetometry and magnetic circular dichroism confirm that the magnetism is at grain boundaries and also in the grains. The overall magnetization originates from the competing effects between grains and grain boundaries.
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ISSN:0295-5075
1286-4854