start-ver=1.4
cd-journal=joma
no-vol=104
cd-vols=
no-issue=3
article-no=
start-page=
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2008
dt-pub=20080813
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Preparation and characterization of epitaxial Fe2-xTixO3 films with various Ti concentrations (0.5 < x < 1.0)
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=<p>An ilmenite-hematite solid solution ( Fe<sub>2-x</sub>Ti<sub>x</sub>O<sub>3</sub> ) is one of the candidates for practical magnetic
semiconductors with a high Curie temperature. We have prepared well-crystallized epitaxial
Fe<sub>2-x</sub>Ti<sub>x</sub>O<sub>3</sub> films with a wide range of Ti concentrations - x=0.50, 0.60, 0.65, 0.76, 0.87, and
0.94 - on &#945;-Al<sub>2</sub>O<sub>3</sub>(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&#60;0.7. The inverse temperature dependence of the
resistivities of the films indicates their semiconducting behavior. The film resistivities decrease with
decreasing Ti concentration.</p>

en-copyright=
kn-copyright=

en-aut-name=TakadaY.
en-aut-sei=Takada
en-aut-mei=Y.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=NakanishiM.
en-aut-sei=Nakanishi
en-aut-mei=M.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=FujiiT.
en-aut-sei=Fujii
en-aut-mei=T.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=TakadaJ.
en-aut-sei=Takada
en-aut-mei=J.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=MuraokaY.
en-aut-sei=Muraoka
en-aut-mei=Y.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

affil-num=1
en-affil=
kn-affil=Department of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University

affil-num=2
en-affil=
kn-affil=Department of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University

affil-num=3
en-affil=
kn-affil=Department of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University

affil-num=4
en-affil=
kn-affil=Department of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University

affil-num=5
en-affil=
kn-affil=Department of Physics, Graduate School of Natural Science and Technology, Okayama University
END