We present a study of the magnetic structure of an exchange biased bilayer system. By combining nuclear resonant scattering and polarized neutron reflectometry on the same sample, we are able to assess the magnetic ground state of both the ferromagnetic (F) FePt and antiferromagnetic (AF) components of the system. Below the Néel temperature , AF order appears in the layer with a spin wavevector pointing along the [100] axis. The AF phase, where the spin wavevector aligns along the [110] axis is not observed. A net magnetization of the layer, which increases towards the interface, is found. Magnetic coupling between the ferromagnetic moments within the layer and the adjacent FePt layer is believed to be the cause of the suppression of the phase.
REFERENCES
1.
O.
Gutfleisch
, L.
Lyubina
, K. H.
Muller
, and L.
Schultz
, Adv. Eng. Mater.
7
, 208
(2005
).2.
B. D.
Terris
and T.
Thomson
, J. Phys. D: Appl. Phys.
38
, R199
(2005
).3.
J. P.
Wang
, Proc. IEEE
96
, 1847
(2008
).4.
Y. F.
Xu
, M. L.
Yan
, and D. J.
Sellmyer
, J. Nanosci. Nanotechnol.
7
, 206
(2007
).5.
J.
Yin
, T.
Suzuki
, M. A. I.
Nahid
, and L.
Pan
, J. Phys. D: Appl. Phys.
41
, 185004
(2008
).6.
S.
Maat
, O.
Hellwig
, G.
Zelter
, E. E.
Fullerton
, G. J.
Mankey
, M. L.
Crow
, and J. L.
Robertson
, Phys. Rev. B
63
, 134426
(2001
).7.
J.
Nogués
and I. K.
Schuller
, J. Magn. Magn. Mater.
192
, 203
(1999
).8.
R. L.
Stamps
, J. Phys. D
33
, R247
(2000
).9.
X.
Rui
, J. E.
Shield
, Z.
Sun
, R.
Skomski
, Y.
Xu
, D. J.
Sellmyer
, M. J.
Kramer
, and Y. Q.
Wu
, J. Magn. Magn. Mater.
320
, 2576
(2008
).10.
D.
Lott
, F.
Klose
, H.
Ambaye
, G. J.
Mankey
, P.
Mani
, M.
Wolff
, A.
Schreyer
, H. M.
Christen
, and B. C.
Sales
, Phys. Rev. B
77
, 132404
(2008
).11.
R. L.
Compton
, M. J.
Pechan
, S.
Maat
, and E. E.
Fullerton
, Phys. Rev. B
66
, 054411
(2002
).12.
P.
Mani
, V. V.
Krishtnamurthy
, R. L.
Robertson
, F.
Klose
, and G. J.
Mankey
, J. Appl. Phys.
99
, 08C109
(2006
).13.
T.
Saerbeck
, F.
Klose
, D.
Lott
, G. J.
Mankey
, Z.
Lu
, P. R.
Leclair
, W.
Schmidt
, A. P. J.
Stampfl
, S.
Danilkin
, M.
Yethiraj
, and A.
Schreyer
, Phys. Rev. B
82
, 134409
(2010
).14.
Z.
Lu
, M. J.
Walock
, P. R.
Leclair
, G. J.
Mankey
, P.
Mani
, D.
Lott
, F.
Klose
, H.
Ambaye
, V.
Lauter
, M.
Wolff
, A.
Schreyer
, H. M.
Christen
, and B. C.
Sales
, J. Vac. Sci. Technol. A
27
, 770
(2009
).15.
B.
Laenens
, F. M.
Almeida
, N.
Planckaert
, K.
Temst
, J.
Meersschaut
, A.
Vantomme
, C.
Rentenberger
, M.
Rennhofer
, and B.
Sepiol
, J. Appl. Phys.
105
, 073913
(2009
).16.
R.
Röhlsberger
, Nuclear Condensed Matter Physics with Synchrotron Radiation
, Springer Tracts in Modern Physics, Vol. 208 (Springer-Verlag
, Berlin
, 2004
).17.
S.
Couet
, Th.
Diederich
, S.
Stankov
, K.
Schlage
, T.
Slezak
, R.
Rüffer
, J.
Korecki
, and R.
Röhlsberger
, Appl. Phys. Lett.
94
, 162501
(2009
).18.
B.
Laenens
, N.
Planckaert
, J.
Demeter
, M.
Trekels
, C.
L'abbé
, C.
Strohm
, R.
Rüffer
, K.
Temst
, A.
Vantomme
, and J.
Meersschaut
, Phys. Rev. B
82
, 104421
(2010
).19.
S.
Couet
, K.
Schlage
, Th.
Diederich
, R.
Rüffer
, K.
Theis-Bröhl
, B. P.
Toperverg
, K.
Zhernenkov
, H.
Zabel
, and R.
Röhlsberger
, New. J. Phys.
11
, 013038
(2009
).20.
W. A. A.
Macedo
, B.
Sahoo
, J.
Eisenmenger
, M. D.
Martins
, W.
Keune
, V.
Kuncser
, R.
Röhlsberger
, O.
Leupold
, R.
Rüffer
, J.
Nogués
, K.
Liu
, K.
Schlage
, and I. K.
Schuller
, Phys. Rev. B
78
, 224401
(2008
).21.
R. A.
Young
, The Rietveld Method
, International Union of Crystallography (Oxford University Press
, Oxford
, 1995
).22.
L.
Lutteroni
and P.
Scardi
, J. Appl. Crystallogr.
23
, 246
(1990
).23.
S.
Couet
, K.
Schlage
, R.
Rüffer
, S.
Stankov
, Th.
Diederich
, B.
Laenens
, and R.
Röhlsberger
, Phys. Rev. Lett.
103
, 097201
(2009
).24.
R.
Rüffer
and A. I.
Chumakov
, Hyperfine Interact.
97/98
, 589
(1996
).25.
E.
Bacon
and J.
Crangle
, Proc. R. Soc. London, Ser. A
272
, 387
(1963
).26.
S. S.
Hanna
, J.
Heberle
, C.
Littlejohn
, G. J.
Perlow
, B. S.
Preston
, and D. H.
Vincent
, Phys. Rev. Lett.
4
, 177
(1960
).27.
R.
Felici
, J.
Penfold
, R. C.
Ward
, and W. G.
Williams
, Appl. Phys. A: Solids Surf.
45
, 169
(1988
).28.
J.
Penfold
, R. C.
Ward
, and W. G.
Williams
, J. Phys. E: J. Sci Instrum.
20
, 1411
(1987
).29.
S. J.
Blundell
and J. A. C.
Bland
, Phys. Rev. B
46
, 3391
(1992
).30.
O.
Dmitrieva
, M.
Spasova
, C.
Antoniak
, M.
Acet
, G.
Dumpich
, J.
Kästner
, M.
Farle
, K.
Fauth
, U.
Wiedwald
, H.-G.
Boyen
, and P.
Ziemann
, Phys. Rev. B
76
, 064414
(2007
).31.
M.
Rennhofer
, B.
Sepiol
, M.
Sladecek
, D.
Kmiec
, S.
Stankov
, G.
Vogl
, M.
Kozlowski
, R.
Kozubski
, A.
Vantomme
, J.
Meersschaut
, R.
Rüffer
, and A.
Gupta
, Phys. Rev. B
74
, 104301
(2006
).32.
M.
Kozlowski
, B.
Kozubski
, Ch.
Goyhenex
, V.
Pierron-Bohnes
, M.
Rennhofer
, and S.
Malinov
, Intermetallics
17
, 907
(2009
).© 2013 American Institute of Physics.
2013
American Institute of Physics
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