Mn-doped Ga2O3 (7 cation % of Mn) thin film has been grown on c-cut sapphire substrate using pulsed-laser deposition technique. Electron diffraction analyses by transmission electron microscopy found that the Mn-doped film shows γ phase with spinel structure, which is different from undoped film showing β phase. No secondary phase can be detected. Combination of Mn-L2,3 near edge x-ray absorption experiments with first-principles many-electron calculations unambiguously implies that Mn atoms are located at tetrahedrally coordinated Ga sites with a valence of +2. The doped sample shows ferromagnetism up to 350K.

1.
H.
Munekata
,
H.
Ohno
,
S.
von Molnar
,
A.
Segmüller
,
L. L.
Chang
, and
L.
Esaki
,
Phys. Rev. Lett.
63
,
1849
(
1989
).
2.
H.
Ohno
,
A.
Shen
,
F.
Matsukura
,
A.
Oiwa
,
A.
Endo
,
S.
Katsumoto
, and
Y.
Iye
,
Appl. Phys. Lett.
69
,
363
(
1996
).
3.
Y.
Matsumoto
,
M.
Murakami
,
T.
Shono
,
T.
Hasegawa
,
T.
Fukumura
,
M.
Kawasaki
,
P.
Ahmet
,
T.
Chikyow
,
S.
Koshihara
, and
H.
Koinuma
,
Science
291
,
854
(
2001
).
4.
P.
Sharma
,
A.
Gupta
,
K. V.
Rao
,
F. J.
Owens
,
R.
Sharma
,
R.
Ahuja
,
J. M.
Osorio Guillen
,
B.
Johansson
, and
G. A.
Gehring
,
Nat. Mater.
2
,
673
(
2003
).
5.
S.
Sonoda
,
S.
Shimizu
,
T.
Sasaki
,
Y.
Yamamoto
, and
H.
Hori
,
J. Cryst. Growth
237
,
1358
(
2002
).
6.
S.
Sonoda
,
I.
Tanaka
,
H.
Ikeno
,
T.
Yamamoto
,
F.
Oba
,
T.
Araki
,
Y.
Yamamoto
,
K.
Suga
,
Y.
Nanishi
,
Y.
Akasaka
,
K.
Kindo
, and
H.
Hori
,
J. Phys.: Condens. Matter
18
,
4615
(
2006
).
7.
R.
Roy
,
V. G.
Hill
, and
E. F.
Osborn
,
J. Am. Chem. Soc.
74
,
719
(
1952
).
8.
M.
Orita
,
H.
Hiramatsu
,
H.
Ohta
,
M.
Hirano
, and
H.
Hosono
,
Thin Solid Films
411
,
134
(
2002
).
9.
B.
Gilbert
,
B. H.
Frazer
,
A.
Belz
,
P. G.
Conrad
,
K. H.
Nealson
,
D.
Haskel
,
J. C.
Lang
,
G.
Srajer
, and
G.
De Stasio
,
J. Phys. Chem. A
107
,
2839
(
2003
).
10.
H.
Ikeno
,
I.
Tanaka
,
Y.
Koyama
,
T.
Mizogushi
, and
K.
Ogasawara
,
Phys. Rev. B
72
,
075123
(
2005
).
11.
P. E.
Blöchl
,
Phys. Rev. B
50
,
17953
(
1994
).
12.
G.
Kresse
and
J.
Hafner
,
Phys. Rev. B
48
,
13115
(
1993
).
13.
G.
Kresse
and
J.
Furthmüller
,
Phys. Rev. B
54
,
11169
(
1996
).
14.
G.
Kresse
and
J.
Furthmüller
,
Comput. Mater. Sci.
6
,
15
(
1996
).
15.
B.
Boucher
,
A. G.
Herpin
, and
A.
Oles
,
J. Appl. Phys.
37
,
960
(
1966
).
16.
T.
Sasaki
,
S.
Sonoda
,
Y.
Yamamoto
,
K.
Suga
,
S.
Shimizu
,
K.
Kindo
, and
H.
Hori
,
J. Appl. Phys.
91
,
7911
(
2002
).
You do not currently have access to this content.