J. Phys. IV France 112 (2003) 993
DOI: 10.1051/jp4:20031048

Lorentz study of magnetic domains in Heusler-type ferromagnetic shape memory alloys

M. De Graef¹, Y. Kishi², Y. Zhu³ and M. Wuttig<sup>2

1</sup>  Carnegie Mellon University, Department of Materials Science and Engineering, 5000 Forbes Avenue, Pittsburgh, PA 15213-3890, U.S.A.
²  University of Maryland, Department of Materials and Nuclear Engineering, Stadium Drive, Bldg. 090, College Park, MD 20742-2115, U.S.A.
³  Brookhaven National Laboratory, Division of Materials Science, Upton, NY 11973-5000, U.S.A.

Abstract
We report on magnetic domain observations using in-situ Lorentz microscopy of the ferromagnetic shape memory alloys of the type Ni ₂MnGa and Co ₂NiGa. The domain configurations are analyzed by means of the Transport-of-Intensity phase reconstruction method.

© EDP Sciences 2003