We report on the preparation and characterization of the double-perovskite compound Sr2CrWO6 with a Curie temperature of 390 K. We have fabricated both Sr2CrWO6 bulk sintered polycrystalline bars and high-quality epitaxial thin films on SrTiO3 substrates by pulsed-laser deposition. The samples were characterized by thermogravimetric analysis, x-ray diffraction, electrical transport, and magnetization measurements. Polycrystalline samples containing a large number of grain boundaries show a large low-field magnetoresistance of up to 100% at 5 K. At room temperature, this effect is reduced to a few percent. Our results show that Sr2CrWO6 is an interesting candidate for room-temperature magnetoelectronic materials.

Topics
Crystallographic defects, Electronic transport, Magnetic devices, Magnetic resonance, Phase transitions, X-ray diffraction, Polycrystalline material, Perovskites, Thermogravimetric analysis, Thin films
1.
J. S.
Moodera
and
G.
Mathon
,
J. Magn. Magn. Mater.
200
,
248
(
1999
).
Google Scholar
 
2.
S. S. P.
Parkin
,
K. P.
Roche
,
M. G.
Samant
,
P. M.
Rice
,
R. B.
Byers
,
R. E.
Scheuerlein
,
E. J.
O’Sullivan
,
S. L.
Brown
,
J.
Bucchigano
,
D. W.
Abraham
,
Yu
Lu
,
M.
Rooks
,
P. L.
Trouilloud
,
R. A.
Wanner
, and
W. J.
Gallagher
,
J. Appl. Phys.
85
,
5828
(
1999
).
Google Scholar
 
3.
R. A.
de Groot
,
F. M.
Mueller
,
P. G.
van Engen
, and
K. H. J.
Buschow
,
Phys. Rev. Lett.
50
,
2024
(
1983
).
Google Scholar
 
4.
R.
von Helmholt
,
J.
Wecker
,
B.
Holzapfel
,
L.
Schultz
, and
K.
Samwer
,
Phys. Rev. Lett.
71
,
2331
(
1993
).
Google Scholar
 
5.
J.-H.
Park
,
E.
Vescovo
,
H.-J.
Kim
,
C.
Kwon
,
R.
Ramesh
, and
T.
Venkatesan
,
Nature (London)
392
,
794
(
1998
).
Google Scholar
 
6.
K.-I.
Kobayashi
,
T.
Kimura
,
H.
Sawada
,
K.
Terakura
, and
Y.
Tokura
,
Nature (London)
395
,
677
(
1998
).
Google Scholar
 
7.
K.-I.
Kobayashi
,
T.
Kimura
,
Y.
Tomioka
,
H.
Sawada
,
K.
Terakura
, and
Y.
Tokura
,
Phys. Rev. B
59
,
11159
(
1999
).
Google Scholar
 
8.
T.
Manako
,
M.
Izumi
,
Y.
Konishi
,
K.-I.
Kobayashi
,
M.
Kawasaki
, and
Y.
Tokura
,
Appl. Phys. Lett.
74
,
2215
(
1999
).
Google Scholar
 
9.
H.
Asano
,
S. B.
Ogale
,
J.
Garrison
,
A.
Orozco
,
Y. H.
Li
,
E.
Li
,
V.
Smolyaninova
,
C.
Galley
,
M.
Downes
,
M.
Rajeswari
,
R.
Ramesh
, and
T.
Venkatesan
,
Appl. Phys. Lett.
74
,
3696
(
1999
).
Google Scholar
 
10.
W.
Westerburg
,
D.
Reisinger
, and
G.
Jakob
,
Phys. Rev. B
62
,
R767
(
2000
).
Google Scholar
 
11.
F. K.
Patterson
,
C. W.
Moeller
, and
R.
Ward
,
Inorg. Chem.
2
,
196
(
1963
).
Google Scholar
 
12.
Y.
Tomioka
,
T.
Okuda
,
Y.
Okimoto
,
R.
Kumai
,
K.-I.
Kobayashi
, and
Y.
Tokura
,
Phys. Rev. B
61
,
422
(
2000
).
Google Scholar
 
13.
D. D.
Sarma
,
E. V.
Sampathkumaran
,
Sugata
Ray
,
R.
Nagarajan
,
Subham
Majumdar
,
Ashwani
Kumar
,
G.
Nalini
, and
T. N.
Guru Row
,
Solid State Commun.
114
,
465
(
2000
).
Google Scholar
 
14.
R.
Gross
,
J.
Klein
,
B.
Wiedenhorst
,
C.
Höfener
,
U.
Schoop
,
J. B.
Philipp
,
M.
Schonecke
,
F.
Herbstritt
,
L.
Alff
,
Yafeng
Lu
,
A.
Marx
,
S.
Schymon
,
S.
Thienhaus
, and
W.
Mader
,
Proc. SPIE
4058
,
278
(
2000
).
Google Scholar
 
15.
M.
Garcı́a-Hernández
,
J. L.
Martı́nez
,
M. J.
Martı́nez-Lope
,
M. T.
Casais
, and
J. A.
Alonso
,
Phys. Rev. Lett.
86
,
2443
(
2001
).
Google Scholar
 
16.
M.
Jullière
,
Phys. Lett. A
54
,
225
(
1975
).
Google Scholar
 
17.
A. S.
Ogale
,
S. B.
Ogale
,
R.
Ramesh
, and
T.
Venkatesan
,
Appl. Phys. Lett.
75
,
537
(
1999
).
Google Scholar
 
This content is only available via PDF.
© 2001 American Institute of Physics.
2001
American Institute of Physics
You do not currently have access to this content.