We studied Fe double layer films on W(110) to investigate the role of strain relaxation in determination of the magnetic ground states. The spin reorientation transition (SRT) between perpendicular and in-plane magnetization takes place with varying density of dislocation lines as imaged with spin polarized scanning tunneling microscopy/spectroscopy. Unexpected domain wall orientation along W[001] and aperiodic magnetic domain patterns suggest that strain relaxation-induced domain has an easy axis along W[001] rather than W[11¯0] in conjunction with the Dzyaloshinskii-Moriya interaction. Furthermore, we confirmed that the SRT can be suppressed by reducing the density of the dislocation lines with lower temperature annealing.

1.
H.
Bethge
,
D.
Heuer
,
C.
Jensen
,
K.
Reshöft
, and
U.
Köhler
,
Surf. Sci.
331–333
,
878
(
1995
).
2.
H. J.
Elmers
,
J.
Hauschild
, and
U.
Gradmann
,
Phys. Rev. B
59
,
3688
(
1999
).
3.
A.
Kubetzka
,
M.
Bode
,
O.
Pietzsch
, and
R.
Wiesendanger
,
Phys. Rev. Lett.
88
,
057201
(
2002
).
4.
E. Y.
Vedmedenko
,
A.
Kubetzka
,
K.
von Bergmann
,
O.
Pietzsch
,
M.
Bode
,
J.
Kirschner
,
H. P.
Oepen
, and
R.
Wiesendanger
,
Phys. Rev. Lett.
92
,
077207
(
2004
).
5.
M.
Heide
,
G.
Bihlmayer
, and
S.
Blügel
,
Phys. Rev. B
78
,
140403
R
(
2008
).
6.
S.
Meckler
,
N.
Mikuszeit
,
A.
Preßler
,
E. Y.
Vedmedenko
,
O.
Pietzsch
, and
R.
Wiesendanger
,
Phys. Rev. Lett.
103
,
157201
(
2009
).
7.
K.
Zakeri
,
Y.
Zhang
,
J.
Prokop
,
T.-H.
Chuang
,
N.
Sakr
,
W. X.
Tang
, and
J.
Kirschner
,
Phys. Rev. Lett.
104
,
137203
(
2010
).
8.
N.
Weber
,
K.
Wagner
,
H. J.
Elmers
,
J.
Hauschild
, and
U.
Gradmann
,
Phys. Rev. B
55
,
14121
(
1997
).
9.
T.
Dürkop
,
H. J.
Elmers
, and
U.
Gradmann
,
J. Magn. Magn. Mater.
172
,
L1
(
1997
).
10.
M.
Bode
,
K.
von Bergmann
,
O.
Pietzsch
,
A.
Kubetzka
, and
R.
Wiesendanger
,
J. Magn. Magn. Mater.
304
,
1
(
2006
).
11.
See supplementary material at http://dx.doi.org/10.1063/1.3657138 for details of the sample holder and for the Fe double layers elongated along the [001] direction.
12.
T.-H.
Kim
,
B.-Y.
Choi
,
Y. J.
Song
,
W. G.
Park
,
S.-J.
Kahng
, and
Y.
Kuk
,
Phys. Rev. B
67
,
233401
(
2003
).
13.
J.
Seo
,
T.-H.
Kim
,
S.-H.
Chung
,
Y.
Oh
,
J. H.
Choi
, and
Y.
Kuk
,
Appl. Phys. Lett.
96
,
073106
(
2010
).
14.
H. J.
Elmers
,
J.
Hauschild
, and
U.
Gradmann
,
J. Magn. Magn. Mater.
221
,
219
(
2000
).
15.
The density of the dislocation lines is calculated for the DLs having widths are ∼50 nm.
16.
M.
Bode
,
A.
Wachowiak
,
J.
Wiebe
,
A.
Kubetzka
,
M.
Morgenstern
, and
R.
Wiesendanger
,
Appl. Phys. Lett.
84
,
948
(
2004
).
17.
R.
Zdyb
,
T. O.
Menteş
,
A.
Locatelli
,
M. A.
Niño
, and
E.
Bauer
,
Phys. Rev. B
80
,
184425
(
2009
).
18.
H.-J.
Elmers
,
J.
Hauschild
, and
U.
Gradmann
,
Phys. Rev. B
54
,
15224
(
1996
).
19.
I. E.
Dzyaloshinskii
,
Sov. Phys. JETP
5
,
1259
(
1957
).
20.
T.
Moriya
,
Phys. Rev.
120
,
91
(
1960
).
21.
M.
Bode
,
M.
Heide
,
K.
von Bergmann
,
P.
Ferriani
,
S.
Heinze
,
G.
Bihlmayer
,
A.
Kubetzka
,
O.
Pietzsch
,
S.
Blügel
, and
R.
Wiesendanger
,
Nature
447
,
190
(
2007
).
22.
P.
Ferriani
,
K.
von Bergmann
,
E. Y.
Vedmedenko
,
S.
Heinze
,
M.
Bode
,
M.
Heide
,
G.
Bihlmayer
,
S.
Blügel
, and
R.
Wiesendanger
,
Phys. Rev. Lett.
101
,
027201
(
2008
).
23.
P.
Sessi
,
N. P.
Guisinger
,
J. R.
Guest
, and
M.
Bode
,
Phys. Rev. Lett.
103
,
167201
(
2009
).
24.
E. Y.
Vedmedenko
,
L.
Udvardi
,
P.
Weinberger
, and
R.
Wiesendanger
,
Phy. Rev. B
75
,
104431
(
2007
).

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