We have prepared arrays of parallel Fe1−xCox alloy nanowires along the atomic step edges of a miscut W(110) surface. Their magnetic properties have been studied with the surface magneto-optical Kerr effect as a function of the relative concentration of the two materials. At low (<35%) cobalt concentrations, the wire arrays exhibit a ferromagnetic easy axis along the substrate [1 −1 0] direction, which is in the surface plane, but perpendicular to the wires. Unlike the bulk alloy, this system shows a decrease in its Curie temperature as cobalt is added to pure Fe. The Curie temperature drops sharply near x=0.35, indicating that cobalt frustrates magnetic ordering in the system.

1.
H. J.
Elmers
,
J.
Hauschild
,
H.
Hoche
,
U.
Gradmann
,
H.
Bethge
,
D.
Heuer
, and
U.
Kohler
,
Phys. Rev. Lett.
73
,
898
(
1994
).
Google Scholar
 
2.
H. J.
Elmers
,
J.
Hauschild
, and
U.
Gradmann
,
J. Magn. Magn. Mater.
177–181
,
827
(
1998
).
Google Scholar
 
3.
M.
Pratzer
,
H. J.
Elmers
,
O.
Pietzsch
,
A.
Kubetzka
,
M.
Bode
, and
R.
Wiesendanger
,
Phys. Rev. Lett.
87
,
127201
(
2001
).
Google Scholar
 
4.
O.
Pietzsch
,
A.
Kubetzka
,
M.
Bode
, and
R.
Wiesendanger
,
Phys. Rev. Lett.
84
,
5212
(
2000
).
Google Scholar
 
5.
P. M.
Paulus
,
F.
Luis
,
M.
Kroll
,
G.
Schmid
, and
L. J.
de Jongh
,
J. Magn. Magn. Mater.
224
,
180
(
2001
).
Google Scholar
 
6.
J.
Shen
,
M.
Klaua
,
P.
Ohresser
,
H.
Jenniches
,
J.
Barthel
,
Ch. V.
Mohan
, and
J.
Kirschner
,
Phys. Rev. B
56
,
11134
(
1997
).
Google Scholar
 
7.
A.
Sugawara
,
T.
Coyle
,
G. G.
Hembree
, and
M. R.
Scheinfein
,
Appl. Phys. Lett.
70
,
1043
(
1997
).
Google Scholar
 
8.
T. Nishizawa and K. Ishida, Binary Alloy Phase Diagrams (ASM, Materials Park, OH, 1986), vol. 1, p. 764.
9.
J. M.
Macleren
,
T. C.
Schulthess
,
W. H.
Butler
,
R.
Sutton
, and
M.
McHenry
,
J. Appl. Phys.
85
,
4833
(
1999
).
Google Scholar
 
10.
M.
Henzler
,
Appl. Surf. Sci.
11-12
,
450
(
1982
).
Google Scholar
 
11.
M.
Henzler
,
Appl. Phys. A: Solids Surf.
34
,
205
(
1984
).
Google Scholar
 
12.
B. G.
Johnson
,
P. J.
Berlowitz
,
D. W.
Goodman
, and
C. H.
Bartholomew
,
Surf. Sci.
217
,
13
(
1989
).
Google Scholar
 
13.
H.-J.
Elmers
,
J.
Hauschild
, and
U.
Gradmann
,
Phys. Rev. B
54
,
15224
(
1996
).
Google Scholar
 
14.
H.
Fritzsche
,
J.
Kohlhepp
, and
U.
Gradmann
,
Phys. Rev. B
51
,
15933
(
1995
).
Google Scholar
 
15.
G.
Garreau
,
M.
Farle
,
E.
Beaurepaire
, and
K.
Baberschke
,
Phys. Rev. B
55
,
330
(
1997
).
Google Scholar
 
16.
S.
Krimmel
,
W.
Donner
,
B.
Nickel
,
H.
Dosch
,
C.
Sutter
, and
G.
Grubel
,
Phys. Rev. Lett.
78
,
3880
(
1997
).
Google Scholar
 
This content is only available via PDF.
© 2002 American Institute of Physics.
2002
American Institute of Physics
You do not currently have access to this content.