Magnetic properties of nanometer-thick Co films intercalated at the graphene/Ir(111) interface are investigated using spin-polarized low-energy electron microscopy and Auger electron spectroscopy. We show that the graphene top layer promotes perpendicular magnetic anisotropy in the Co film underneath, even for relatively thick intercalated deposits. The magnetic anisotropy energy is significantly larger for the graphene/Co interface than for the free Co surface. Hybridization of the graphene and Co electron orbitals is believed to be at the origin of the observed perpendicular magnetic anisotropy.
REFERENCES
1.
W.
Han
and R. K.
Kawakami
, Phys. Rev. Lett.
107
, 047207
(2011
).2.
N.
Tombros
, C.
Jozsa
, M.
Popinciuc
, H. T.
Jonkman
, and B. J.
van Wees
, Nature (London)
448
, 571
(2007
).3.
Y. W.
Son
, M. L.
Cohen
, and S. G.
Louie
, Nature (London)
444
, 347
(2006
).4.
V. M.
Karpan
, G.
Giovannetti
, P. A.
Khomyakov
, M.
Talanana
, A. A.
Starikov
, M.
Zwierzycki
, J.
van den Brink
, G.
Brocks
, and P. J.
Kelly
, Phys. Rev. Lett.
99
, 176602
(2007
).5.
M.
Weser
, E. N.
Voloshina
, K.
Horna
, and Yu. S.
Dedkov
, Phys. Chem. Chem. Phys.
13
, 7534
(2011
).6.
A.
Varykhalov
, J.
Sánchez-Barriga
, A. M.
Shikin
, C.
Biswas
, E.
Vescovo
, A.
Rybkin
, D.
Marchenko
, and O.
Rader
, Phys. Rev. Lett.
101
, 157601
(2008
).7.
F.
El Gabaly
, K. F.
McCarty
, A. K.
Schmid
, J.
de la Figuera
, M. C.
Muñoz
, L.
Szunyogh
, P.
Weinberger
, and S.
Gallego
, New J. Phys.
10
, 073024
(2008
).8.
B.
Santos
, S.
Gallego
, A.
Mascaraque
, K. F.
McCarty
, A.
Quesada
, A. T.
N'Diaye
, A. K.
Schmid
, and J. de la
Figuera
, Phys. Rev. B
85
134409
(2012
).9.
C.
Binns
, S. H.
Baker
, C.
Demangeat
, and J. C.
Parlebas
, Surf. Sci. Rep.
34
, 107
(1999
).10.
A. T.
N'Diaye
, T.
Gerber
, M.
Busse
, J.
Myslivecek
, J.
Coraux
, and T.
Michely
, New J. Phys.
11
, 103045
(2009
).11.
C.
Vo-Van
, Z.
Kassir-Bodon
, H.
Yang
, J.
Coraux
, J.
Vogel
, S.
Pizzini
, P.
Bayle-Guillemaud
, M.
Chshiev
, L.
Ranno
, V.
Guisset
, P.
David
, V.
Salvador
, and O.
Fruchart
, New J. Phys.
12
, 103040
(2010
).12.
A. Y.
Tontegode
, Prog. Surf. Sci.
38
, 201
(1991
).13.
E.
Bauer
, in Magnetic Microscopy of Nanostructures
, edited by H.
Hopster
and H. P.
Oepen
(Springer
, Berlin
, 2005
), p. 111
.14.
E.
Bauer
, in Modern Techniques for Characterizing Magnetic Materials
, edited by Y.
Zhu
(Kluwer
, Boston
, 2005
), p. 361
.15.
N.
Rougemaille
and A. K.
Schmid
, Eur. Phys. J. Appl. Phys.
50
, 20101
(2010
).16.
J.
Coraux
, A. T.
N'Diaye
, M.
Engler
, C.
Busse
, D.
Wall
, N.
Buckanie
, F.-J.
Meyer zu Heringdorf
, R.
van Gastel
, B.
Poelsema
, and T.
Michely
, New J. Phys.
11
, 023006
(2009
).17.
A monolayer is defined as the first atomic layer of Co that grows pseudomorphically on Ir(111).
18.
B.
Unal
, Y.
Sato
, K. F.
McCarty
, N. C.
Bartelt
, T.
Duden
, C. J.
Jenks
, A. K.
Schmid
, and P. A.
Thiel
, J. Vac. Sci. Technol. A
27
, 1249
(2009
).19.
E.
Loginova
, S.
Nie
, K.
Thürmer
, N. C.
Bartelt
, and K. F.
McCarty
, Phys. Rev. B
80
, 085430
(2009
).20.
H. F.
Ding
, A. K.
Schmid
, D. Q.
Li
, K. Y.
Guslienko
, and S. D.
Bader
, Phys. Rev. Lett.
94
, 157202
(2005
).21.
W. L.
Ling
, T.
Giessel
, K.
Thürmer
, R. Q.
Hwang
, N. C.
Bartelt
, and K. F.
McCarty
, Surf. Sci.
570
, L297
(2004
).22.
K. F.
McCarty
, J. C.
Hamilton
, Y.
Sato
, A.
Sa
, R.
Stumpf
, J.
de la Figuera
, K.
Thürmer
, F.
Jones
, A. K.
Schmid
, A. A.
Talin
, and N. C.
Bartelt
, New J. Phys.
11
, 043001
(2009
).23.
N.
Rougemaille
and A. K.
Schmid
, J. Appl. Phys.
99
, 08S502
(2006
).24.
F. J. A.
den Broeder
, W.
Hoving
, and P. J. H.
Bloemen
, J. Magn. Magn. Mater.
93
, 562
(1991
).25.
S.
Rusponi
, T.
Cren
, N.
Weiss
, M.
Epple
, L.
Claude
, P.
Buluschek
, and H.
Brune
, Nat. Mater.
2
, 546
(2003
).26.
F.
El Gabaly
, S.
Gallego
, C.
Muñoz
, L.
Szunyogh
, P.
Weinberger
, C.
Klein
, A. K.
Schmid
, K. F.
McCarty
, and J.
de la Figuera
, Phys. Rev. Lett.
96
, 147202
(2006
).© 2012 American Institute of Physics.
2012
American Institute of Physics
You do not currently have access to this content.
