From the magnetic domain patterns at adjacent crystal surfaces of NiMnGa shape memory crystals the internal domain configurations across a hidden twin-boundary are derived. The results proof the existence of domains extending from the sample surfaces into the nonvisible sample volume. Moreover, the structural twin boundary inside the material acts as a mirror for the basic domains. The analysis validates the relevance of surface magnetic response analysis for the understanding of the magnetoelastic behavior of magnetic shape memory alloys and is essential for the interpretation of magnetic domain images obtained from other surface-restricted observation techniques.
REFERENCES
1.
K.
Ullakko
, J. K.
Huang
, C.
Kantner
, R. C.
O’Handley
, and V. V.
Kokorin
, Appl. Phys. Lett.
69
, 1966
(1996
).2.
Y. W.
Lai
, N.
Scheerbaum
, D.
Hinz
, O.
Gutfleisch
, R.
Schäfer
, L.
Schultz
, and J.
McCord
, Appl. Phys. Lett.
90
, 192507
(2007
).3.
Y.
Ganor
, D.
Shilo
, T. W.
Shield
, and R. D.
James
, Appl. Phys. Lett.
93
, 122509
(2008
).4.
J. N.
Armstrong
, M. R.
Sullivan
, M. L.
Romancer
, V. A.
Chernenko
, and H. D.
Chopra
, J. Appl. Phys.
103
, 023905
(2008
).5.
Y. M.
Jin
, Appl. Phys. Lett.
94
, 062508
(2009
).6.
H. S.
Park
, Y.
Murakami
, D.
Shindo
, V. A.
Chernenko
, and T.
Kanomata
, Appl. Phys. Lett.
83
, 3752
(2003
).7.
Y.
Ge
, O.
Heczko
, O.
Söderberg
, and S. -P.
Hannula
, Appl. Phys. Lett.
89
, 082502
(2006
).8.
Y.
Ge
, O.
Heczko
, O.
Söderberg
, and V. K.
Lindroos
, J. Appl. Phys.
96
, 2159
(2004
).9.
Q.
Pan
and R. D.
James
, J. Appl. Phys.
87
, 4702
(2000
).10.
11.
O.
Heczko
, J. Magn. Magn. Mater.
290
, 787
(2005
).12.
Y.
Lai
, R.
Schäfer
, L.
Schultz
, and J.
McCord
, Acta Mater.
56
, 5130
(2008
).13.
R. C.
O’Handley
, Modern Magnetic Materials—Principles and Applications
(Wiley
, New York
, 2000
).© 2010 American Institute of Physics.
2010
American Institute of Physics
You do not currently have access to this content.
