We developed a method to fabricate ordered Co/Pt multilayer nanodot arrays using the barrier layer of anodic alumina templates as two-dimensional curved substrates. Large area patterning of self-assembled alumina nanobumps are formed with hexagonally close-packed order. The subsequent deposition of Co/Pt multilayers on this bumpy surface leads to an ordered array of single-domain nanocaps magnetized perpendicularly to the sample surface. Measurement of reversal field as a function of field angle and images of demagnetized state, composed with monobump-wide stripe domains, confirm the weakness of exchange coupling between bits.
REFERENCES
1.
O.
Ozatay
, P. G.
Mather
, J. U.
Thiele
, T.
Hauet
, and P. M.
Braganca
, in Nanofabrication and Devices, Comprehensive Nanoscience and Nanotechnology
, edited by D.
Andrews
, G.
Scholes
, and G.
Wiederrecht
(Elsevier
, London
, 2010
), Vol. 4
, pp. 561
–614
.2.
S. Y.
Chou
, Proc. IEEE
85
, 652
(1997
).3.
F.
Luo
, L. J.
Heyderman
, H. H.
Solak
, T.
Thomson
, and M. E.
Best
, Appl. Phys. Lett.
92
, 102505
(2008
).4.
C. A.
Ross
, H. I.
Smith
, T. A.
Savas
, M.
Schattenberg
, M.
Farhoud
, M.
Hwang
, M.
Walsh
, M. C.
Abraham
, and R. J.
Ram
, J. Vac. Sci. Technol. B
17
, 3168
(1999
).5.
O.
Hellwig
, J. K.
Bosworth
, E.
Dobisz
, D.
Kercher
, T.
Hauet
, G.
Zeltzer
, J. D.
Risner-Jamtgaard
, D.
Yaney
, and R.
Ruiz
, Appl. Phys. Lett.
96
, 052511
(2010
).6.
M.
Albrecht
, G.
Hu
, I. L.
Guhr
, T. C.
Ulbrich
, J.
Boneberg
, P.
Leiderer
, and G.
Schatz
, Nat. Mater.
4
, 203
(2005
).7.
T. C.
Ulbrich
, C.
Bran
, D.
Makarov
, O.
Hellwig
, J. D.
Risner-Jamtgaard
, D.
Yaney
, H.
Rohrmann
, V.
Neu
, and M.
Albrecht
, Phys. Rev. B
81
, 054421
(2010
).8.
L.
Yan
, K.
Wang
, J.
Wu
, and L.
Ye
, Colloids Surf., A
296
, 123
(2007
).9.
P.
Kappenberger
, F.
Luo
, L. J.
Heyderman
, H. H.
Solak
, C.
Padeste
, C.
Brombacher
, D.
Makarov
, T. V.
Ashworth
, L.
Philippe
, H. J.
Hug
, and M.
Albrecht
, Appl. Phys. Lett.
95
, 023116
(2009
).10.
H.
Masuda
and K.
Fukuda
, Science
268
, 1466
(1995
).11.
O.
Rabin
, P. R.
Hertz
, Y.-M.
Lin
, A. I.
Akinwande
, S. B.
Cronin
, and M. S.
Dresselhaus
, Adv. Funct. Mater.
13
, 631
(2003
).12.
F. M.
Rhen
, E.
Backen
, and J. M. D.
Coey
, J. Appl. Phys.
97
, 113908
(2005
).13.
J.
Mallet
, K.
Yu-Zhang
, S.
Mátéfi-Tempfli
, M.
Mátéfi-Tempfli
, and L.
Piraux
, J. Phys. D: Appl. Phys.
38
, 205002
(2005
).14.
L. F.
Liu
, S. S.
Xie
, and W. Y.
Zhou
, J. Phys. D: Appl. Phys.
42
, 205002
(2009
).15.
M. T.
Rahman
, N. N.
Shams
, Y. C.
Wu
, C. H.
Lai
, and D.
Suess
, Appl. Phys. Lett.
91
, 132505
(2007
).16.
C. R.
Martin
, Chem. Mater.
8
, 1739
(1996
).17.
D. J.
Sellmyer
, M.
Zheng
, and R.
Skomski
, J. Phys.: Condens. Matter
13
, R433
(2001
).18.
M.
Hernández-Vélez
, Thin Solid Films
495
, 51
(2006
).19.
S.
Mátéfi-Tempfli
, M.
Mátéfi-Tempfli
, and L.
Piraux
, Thin Solid Films
516
, 3735
(2008
).20.
B.
Delaunay
, Izv. Akad. Nauk SSSR, Otdelenie-Matematicheskih i Estestvennyh Nauk
7
, 793
(1934
).21.
B.
Pfau
, C. M.
Gunther
, E.
Guehrs
, T.
Hauet
, H.
Yang
, L.
Vinh
, X.
Xu
, D.
Yaney
, R.
Rick
, S.
Eisebitt
, and O.
Hellwig
, Appl. Phys. Lett.
99
, 062502
(2011
).22.
O.
Hellwig
, A.
Berger
, T.
Thomson
, E.
Dobisz
, Z. Z.
Bandic
, H.
Yang
, D. S.
Kercher
, and E. E.
Fullerton
, Appl. Phys. Lett.
90
, 162516
(2007
).23.
24.
E. C.
Stoner
and E. P.
Wohlfarth
, Philos. Trans. R. Soc. London A
240
, 599
(1948
).25.
O.
Hellwig
, A.
Berger
, J. B.
Kortright
, and E.
Fullerton
, J. Magn. Magn. Mater.
319
, 13
(2007
).26.
K.
Nielsch
, R. B.
Wehrspohn
, J.
Barthel
, J.
Kirschner
, S. F.
Fischer
, H.
Kronmuller
, T.
Schweinbock
, D.
Weiss
, and U.
Gosele
, J. Magn. Magn. Mater.
249
, 234
(2002
).27.
Y.
Matsui
, K.
Nishio
, and H.
Masuda
, Small
2
, 522
(2006
).28.
G. Q.
Ding
, R.
Yang
, J. N.
Ding
, N. Y.
Yuan
, and Y. Y.
Zhu
, Nanoscale Res. Lett.
5
, 1257
(2010
).© 2012 American Institute of Physics.
2012
American Institute of Physics
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