We report on the preparation and characterization of the double-perovskite compound with a Curie temperature of 390 K. We have fabricated both bulk sintered polycrystalline bars and high-quality epitaxial thin films on 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 is an interesting candidate for room-temperature magnetoelectronic materials.
REFERENCES
1.
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
).3.
R. A.
de Groot
, F. M.
Mueller
, P. G.
van Engen
, and K. H. J.
Buschow
, Phys. Rev. Lett.
50
, 2024
(1983
).4.
R.
von Helmholt
, J.
Wecker
, B.
Holzapfel
, L.
Schultz
, and K.
Samwer
, Phys. Rev. Lett.
71
, 2331
(1993
).5.
J.-H.
Park
, E.
Vescovo
, H.-J.
Kim
, C.
Kwon
, R.
Ramesh
, and T.
Venkatesan
, Nature (London)
392
, 794
(1998
).6.
K.-I.
Kobayashi
, T.
Kimura
, H.
Sawada
, K.
Terakura
, and Y.
Tokura
, Nature (London)
395
, 677
(1998
).7.
K.-I.
Kobayashi
, T.
Kimura
, Y.
Tomioka
, H.
Sawada
, K.
Terakura
, and Y.
Tokura
, Phys. Rev. B
59
, 11159
(1999
).8.
T.
Manako
, M.
Izumi
, Y.
Konishi
, K.-I.
Kobayashi
, M.
Kawasaki
, and Y.
Tokura
, Appl. Phys. Lett.
74
, 2215
(1999
).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
).10.
11.
12.
Y.
Tomioka
, T.
Okuda
, Y.
Okimoto
, R.
Kumai
, K.-I.
Kobayashi
, and Y.
Tokura
, Phys. Rev. B
61
, 422
(2000
).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
).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
).15.
M.
Garcı́a-Hernández
, J. L.
Martı́nez
, M. J.
Martı́nez-Lope
, M. T.
Casais
, and J. A.
Alonso
, Phys. Rev. Lett.
86
, 2443
(2001
).16.
17.
A. S.
Ogale
, S. B.
Ogale
, R.
Ramesh
, and T.
Venkatesan
, Appl. Phys. Lett.
75
, 537
(1999
).
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.