We report on the structure study of MgxZn1xO films and, in particular, we will focus on MgxZn1xO layers with x=0.28 and 0.41 MgxZn1xO layers with different crystal structures of cubic and wurtzite that have been grown by plasma-assisted molecular-beam epitaxy on MgOc-sapphire with MgZn flux ratio control. The MgxZn1xO films have been characterized by high-resolution transmission electron microscopy (HRTEM) and high-resolution x-ray diffraction. The dependence of the cation-anion bond length to Mg content has been studied. A virtual crystal model of MgZnO has been applied to interpret the bond-length variation. HRTEM results indicate that the initial stage of the MgZnO growth on a MgO buffer layer starts with a cubic structure even in the case of a wurtzite structure at the end of growth.

1.
D. M.
Bagnall
,
Y. F.
Chen
,
Z.
Zhu
,
T.
Yao
,
S.
Koyama
,
M. Y.
Shen
, and
T.
Goto
,
Appl. Phys. Lett.
70
,
2230
(
1997
).
2.
A.
Ohtomt
, et al 
Appl. Phys. Lett.
72
,
2466
(
1998
).
3.
W. I.
Park
,
G. C.
Yi
, and
H. M.
Jang
,
Appl. Phys. Lett.
79
,
2022
(
2001
).
4.
E. R.
Segnit
and
A. E.
Holland
,
J. Am. Ceram. Soc.
48
,
412
(
1965
).
5.
A. K.
Sharma
,
J.
Narayan
,
J. F.
Muth
,
C. W.
Teng
,
C.
Jin
,
A.
Kvit
,
R. M.
Kolbas
, and
O. W.
Holland
,
Appl. Phys. Lett.
75
,
3327
(
1999
).
6.
S.
Fujita
,
T.
Takagi
,
H.
Tanaka
, and
S.
Fujita
,
Phys. Status Solidi B
241
,
599
(
2004
).
7.
S.
Choopun
,
R. D.
Vispute
,
W.
Yang
,
R. P.
Sharma
,
T.
Venkatesan
, and
H.
Shen
,
Appl. Phys. Lett.
80
,
1529
(
2002
).
8.
J.
Narayan
,
A. K.
Sharma
,
A.
Kvit
,
C.
Jin
,
J. F.
Muth
, and
O. W.
Holland
,
Solid State Commun.
121
,
9
(
2002
).
9.
T.
Takagi
,
H.
Tanaka
,
S.
Fujita
, and
S.
Fujita
,
Jpn. J. Appl. Phys., Part 2
42
,
L401
(
2003
).
10.
J.
Chen
,
W. Z.
Shen
,
N. B.
Chen
,
D. J.
Qiu
, and
H. Z.
Wu
,
J. Phys.: Condens. Matter
15
,
L475
(
2003
).
11.
A.
Ohtomo
,
M.
Kawasaki
,
I.
Ohkubo
,
H.
Koinuma
,
T.
Yasuda
, and
Y.
Segawa
,
Appl. Phys. Lett.
75
,
980
(
1999
).
12.
T.
Makino
,
K.
Tamura
,
C. H.
Chia
,
Y.
Segawa
,
M.
Kawasaki
,
A.
Ohtomo
, and
H.
Koinuma
,
Phys. Rev. B
66
,
233305
(
2002
).
13.
Y.
Chen
,
H. J.
Ko
,
S. K.
Hong
,
T.
Yao
, and
Y.
Segawa
,
J. Cryst. Growth
214-215
,
87
(
2000
).
14.
J. M.
Recio
,
M. A.
Blanco
,
V.
Luana
,
R.
Pandey
,
L.
Gerward
, and
J. Staun
Olsen
,
Phys. Rev. B
58
,
8949
(
1998
).
15.
S.
Limpijumnong
, and
W. R.
Lambrecht
,
Phys. Rev. B
63
,
104103
(
2001
).
16.
M.
Kunisu
,
I.
Tanaka
,
T.
Yamamoto
,
T.
Suga
, and
T.
Mizoguchi
,
J. Phys.: Condens. Matter
16
,
3801
(
2004
).
You do not currently have access to this content.