We investigate the magnetic properties of the ferromagnetic insulator EuS in view of its potential in spin-filter tunnel contacts to silicon. We prepared thin polycrystalline EuS films directly on (001) oriented Si substrates that show well-defined magnetic properties down to the monolayer regime. Addressing the question of magnetic coupling between a EuS magnetic tunnel barrier and a CoO/Co magnetic electrode, we succeeded in realizing an independent magnetic switching behavior in this spin-valve-type system. These results are important prerequisites for future spin-dependent transport experiments.
REFERENCES
1.
S. A.
Wolf
, D. D.
Awschalom
, R. A.
Buhrmann
, J. M.
Daughton
, S. v.
Molnar
, and M. L.
Roukes
, Science
7294
, 1488
(2001
)2.
G.
Schmidt
, D.
Ferrand
, L.
Molenkamp
, A.
Filip
, and B.
van Wees
, Phys. Rev. B
62
, R4790
(2000
).3.
4.
J. S.
Moodera
, T. S.
Santos
, and T.
Nagahama
, J. Phys. Condens. Matter
19
, 165202
(2007
).5.
X.
Hao
, J. S.
Moodera
, and R.
Meservey
, Phys. Rev. B
42
, 8235
(1990
).6.
G.-X.
Miao
, M.
Müller
and J. S.
Moodera
, Phys. Rev. Lett.
102
, 076601
(2009
).7.
M.
Müller
, G.-X.
Miao
, and J. S.
Moodera
, Europhys. Lett.
88
, 47006
(2009
).8.
A.
Schmehl
, V.
Vaithyanathan
, A.
Herrnberger
, S.
Thiel
, C.
Richter
, M.
Liberati
, T.
Heeg
, M.
Röckerath
, L.
Fitting Kourkoutis
, S.
Mühlbauer
, P.
Böni
, D. A.
Muller
, Y.
Barash
, J.
Schubert
, Y.
Idzerda
, J.
Mannhart
, and D. G.
Schlom
. Nature Mater.
6
, 882
(2007
).9.
P.
LeClair
, J. K.
Ha
, H. J. M.
Swagten
, J. T.
Kohlhepp
, C. H.
van de Vin
, and W. J. M.
de Jonge
, Appl. Phys. Lett.
80
, 625
(2002
).10.
J.
Noguesa
, J.
Sorta
, V.
Langlaisb
, V.
Skumryeva
, S.
Surinachb
, J.S.
Munozb
, and M.D.
Barob
, Phys. Rep.
422
, 65
(2005
).11.
P.
Tedrow
and R.
Meservey
, Phys. Rev. B
7
, 318
(1973
).12.
G. W.
Trucks
, K.
Raghavachari
, G. S.
Higashi
, and Y. J.
Chabal
, Phys. Rev. Lett.
65
, 504
–507
(1990
).13.
M.
Gruyters
and D.
Riegel
, J. Appl. Phys.
88
, 6610
(2000
).14.
B.
Saftić
, N.
Rasula
, W.
Zinn
, and J.
Chevallier
, J. Magn. Magn. Mater.
28
, 305
(1982
).15.
G.-X.
Miao
and J. S.
Moodera
, Appl. Phys. Lett.
88
, 182504
(2009
).16.
R.
Schilling
and W.
Nolting
, Solid State Commun.
110
, 121
(1999
).17.
M.
Müller
, G.-X.
Miao
, and J. S.
Moodera
, J. Appl. Phys.
105
, 07C917
(2009
)© 2011 American Institute of Physics.
2011
American Institute of Physics
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