A detailed study of twin boundary motion in NiMnGa single crystals together with in situ magnetic domain observation is presented. Optical polarization microscopy in connection with a magneto-optical indicator film technique was used to investigate the reorganization of the magnetic domains during twin boundary motion over a wide magnetic field range. Images at different field strengths demonstrate that no magnetic domain wall motion within the twins takes place, even during the structural reorientation by twin boundary movement. This absence of interaction of magnetic and structural domains is different from currently proposed models, which assume domain wall movement under an external field.
REFERENCES
1.
N.
Sarawate
and M.
Dapino
, Appl. Phys. Lett.
88
, 121923
(2006
).2.
I.
Suorsa
, E.
Pagounus
, and K.
Ullakko
, J. Magn. Magn. Mater.
272-276
, 2029
(2004
).3.
N.
Scheerbaum
, D.
Hinz
, O.
Gutfleisch
, K.-H.
Müller
, and L.
Schultz
, Acta Mater.
55
, 2707
(2007
).4.
N.
Scheerbaum
, D.
Hinz
, O.
Gutfleisch
, W.
Skrotzki
, and L.
Schultz
, J. Appl. Phys.
101
, 09C501
(2007
).5.
A.
Sozinov
, A. A.
Likhachev
, N.
Lanska
, and K.
Ullakko
, Appl. Phys. Lett.
80
, 1746
(2002
).6.
K.
Ullakko
, J. K.
Huang
, C.
Kantner
, R. C.
O’Handley
, and V. V.
Kokorin
, Appl. Phys. Lett.
69
, 1966
(1996
).7.
R. C.
O’Handley
, J. Appl. Phys.
83
, 3263
(1998
).8.
9.
G.
Li
and Y.
Liu
, Appl. Phys. Lett.
88
, 232504
(2006
).10.
Y.
Ge
, O.
Heczko
, O.
Söderberg
, and V. K.
Lindroos
, J. Appl. Phys.
96
, 2159
(2004
).11.
M. R.
Sullivan
and H. D.
Chopra
, Phys. Rev. B
70
, 094427
(2004
).12.
Y.
Ge
, O.
Heczko
, O.
Söderberg
, and S. P.
Hannula
, Scr. Mater.
54
, 2155
(2006
).13.
H. E.
Karaca
, I.
Karaman
, B.
Basaran
, Y. I.
Chumlyakov
, and H. J.
Maier
, Acta Mater.
54
, 233
(2006
).14.
15.
A.
Hubert
and R.
Schäfer
, Magnetic Domains—The Analysis of Magnetic Microstructures
(Springer
, Berlin
, 1998
), p. 48
.© 2007 American Institute of Physics.
2007
American Institute of Physics
You do not currently have access to this content.
