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      Size dependence of martensite transformation temperature in ferromagnetic shape memory alloy FePd

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      Journal of Applied Physics

      AIP Publishing

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          Large magnetic‐field‐induced strains in Ni2MnGa single crystals

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            Magnetic-field-induced shape recovery by reverse phase transformation.

            Large magnetic-field-induced strains have been observed in Heusler alloys with a body-centred cubic ordered structure and have been explained by the rearrangement of martensite structural variants due to an external magnetic field. These materials have attracted considerable attention as potential magnetic actuator materials. Here we report the magnetic-field-induced shape recovery of a compressively deformed NiCoMnIn alloy. Stresses of over 100 MPa are generated in the material on the application of a magnetic field of 70 kOe; such stress levels are approximately 50 times larger than that generated in a previous ferromagnetic shape-memory alloy. We observed 3 per cent deformation and almost full recovery of the original shape of the alloy. We attribute this deformation behaviour to a reverse transformation from the antiferromagnetic (or paramagnetic) martensitic to the ferromagnetic parent phase at 298 K in the Ni45Co5Mn36.7In13.3 single crystal.
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              Quantum size effects in metal particles

               W. Halperin (1986)
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                Author and article information

                Journal
                Journal of Applied Physics
                Journal of Applied Physics
                AIP Publishing
                0021-8979
                1089-7550
                March 15 2008
                March 15 2008
                : 103
                : 6
                : 063910
                10.1063/1.2890143
                © 2008
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