Magnetic shape memory alloys like Ni-Mn-Ga and Fe-Pd can change their shape up to several percent by the reorientation of martensitic variants in a moderate magnetic field. However to date a significant strain is only obtained in single crystals bulk materials. It is expected that epitaxial films are most promising for observation of MSM effect in thin films.

In this presentation we show that Ni-Mn-Ga and Fe-Pd films can be grown epitaxially on MgO(100) substrates. Both material systems are compared with respect to their suitability for microactuator and sensor suitability.

Temperature depended X-ray diffraction and pole figure measurements are used to examine structure and its transformation and microstructural transitions (variant reorientation). Additionally temperature and orientation depended magnetic measurements are used to identify the anisotropic magnetic behavior of these films.

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1. Dynamic observation of field induced twin boundary and magnetic domain wall motion in bulk NiMnGa
2. Magnetic field induced strain and training process in NiMnGa single crystal
3. Integration Technologies for Single-Crystalline NiMnGa Films
4. Preparation of textured Ni₄₈Mn₃₀Ga₂₂
5. Structure and mechanical training of 5M and 7M Ni-Mn-Ga magnetic shape memory alloys
6. Corrosion Behaviour of Iron-based Bulk Metallic Glasses