Paper Titles
Magnetoelastic Coupling in Ni-Mn-Ga Magnetic Shape Memory Alloy
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Evaluation of Magnetostriction of the Single-Variant Ni-Mn-Ga Martensite
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Theoretical Modeling of Magnetocaloric Effect in Heusler Ni-Mn-In Alloy by Monte Carlo Study
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Recent Progress in FSMA Microactuator Developments
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Structural and Magnetic Properties of Epitaxial Ni2MnGa Thin Films
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Magnetically Anisotropic Ni2MnGa Thin Films: Coating Glass and Si Micro-Cantilevers Substrates
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Fabrication and Magnetic Properties of CoNiAl Ferromagnetic Shape Memory Alloy Thin Films
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Thermodynamic Modelling of Ferromagnetic Shape Memory Actuators
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Simulation of an Improved Microactuator with Discrete MSM Elements
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Structural and Magnetic Properties of Epitaxial Ni2MnGa Thin Films

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Abstract:

We report on the preparation and investigation of epitaxial thin films of the magnetic shape memory alloy Ni2MnGa. For samples close to the stoichiometric composition we find that the phase transformation temperature is affected by the crystallographic orientation. Changes in the crystal structure due to the transformation are observed using temperature-dependent X-ray diffraction. Films with higher manganese content are in the martensitic state at room temperature. Those samples on Al2O3(11-20) reveal the 7-layered orthorhombic structure that allows strains up to 10 %. To avoid blocking of magnetostrictive effects by the substrate, free-standing films are prepared using water-soluble NaCl(100) single crystals as substrate.

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Periodical:

Materials Science Forum (Volume 635)

Pages:

155-160

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.635.155

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Online since:

December 2009

Authors:

Tobias Eichhorn, Gerhard Jakob

Keywords:

7M Structure, Epitaxial Thin Films, Free-Standing Film, Martensitic Transformation (MT), Ni2MnGa

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