Triangular-shaped permalloy microstructures in the vortex magnetization state are studied via transmission soft x-ray microscopy, broadband-ferromagnetic resonance measurements, and micromagnetic simulations. The vortex chirality can be controlled via the direction of a saturating in-plane magnetic field applied before nucleation of the vortex state. The resonance frequencies of vortex gyration are probed for different equilibrium positions within the magnetic structure to determine the shape of the asymmetric confining potential. The experimental results are shown to coincide with micromagnetic simulations.
REFERENCES
1.
T.
Shinjo
et al, Science
289
, 930
(2000
).2.
R. P.
Cowburn
et al, Phys. Rev. Lett.
83
, 1042
(1999
).3.
R.
Antos
, Y.
Otani
, and J.
Shibata
, J. Phys. Soc. Jpn.
77
, 031004
(2008
).4.
S.-K.
Kim
et al, Appl. Phys. Lett.
92
, 022509
(2008
).5.
S.
Bohlens
et al, Appl. Phys. Lett.
93
, 142508
(2008
).6.
A.
Vogel
et al, Phys. Rev. Lett.
105
, 037201
(2010
).7.
M.
Weigand
et al, Phys. Rev. Lett.
102
, 077201
(2009
).8.
K.
Yamada
et al, Appl. Phys. Lett.
93
, 152502
(2008
).9.
M.
Kammerer
et al, Nature Commun.
2
, 279
(2011
).10.
S.
Yakata
et al, Appl. Phys. Lett.
97
, 222503
(2010
).11.
M.
Jaafar
et al, Nanotechnology
19
, 285717
(2008
).12.
M.
Jaafar
et al, Phys. Rev. B
81
, 054439
(2010
).13.
14.
M.
Bolte
et al, Phys. Rev. Lett.
100
, 176601
(2008
).15.
A.
Vogel
et al, Phys. Rev. Lett.
106
, 137201
(2011
).16.
S.
Sugimoto
et al, Phys. Rev. Lett.
106
, 197203
(2011
).17.
A.
Vogel
et al, Appl. Phys. Lett.
99
, 042506
(2011
).18.
19.
S.
Barman
, A.
Barman
, and Y.
Otani
, J. Phys. D: Appl. Phys.
43
, 335001
(2010
).20.
J.
Shibata
and Y.
Otani
, Phys. Rev. B
70
, 012404
(2004
).21.
M.
Miyata
et al, J. Appl. Phys.
111
, 07B902
(2012
).22.
P.
Monceau
and J.-C. S.
Lévy
, Phys. Lett. A
374
, 1872
(2010
).23.
M.
Miyata
et al, IEEE Trans. Magn.
47
, 2505
(2011
).24.
P.
Fischer
et al, Mater. Today
9
, 26
(2006
).25.
C. T.
Chen
et al, Phys. Rev. B
42
, 7262
(1990
).26.
J.
Podbielski
, F.
Giesen
, and D.
Grundler
, Phys. Rev. Lett.
96
, 167207
(2006
).27.
A. A.
Thiele
, Phys. Rev. Lett.
30
, 230
(1973
).28.
B.
Krüger
et al, Phys. Rev. B
76
, 224426
(2007
).29.
A.
Drews
et al, Phys. Rev. B
85
, 144417
(2012
).30.
K. Y.
Guslienko
, R.
Hernández Heredero
, and O.
Chubykalo-Fesenko
, Phys. Rev. B
82
, 014402
(2010
).31.
H. H.
Langner
et al, Phys. Rev. B
85
, 174436
(2012
).32.
K. S.
Buchanan
et al, Phys. Rev. B
74
, 064404
(2006
).© 2012 American Institute of Physics.
2012
American Institute of Physics
You do not currently have access to this content.