Phase Transitions in Co-Doped NiMnGa Magnetic Shape Memory Alloys Probed by Coherent Phonons

Oliver Ristow,Moritz Merklein, Yuanson Luo,Vitalyi E Gusev,Martin Grossmann,Chuan He,Jure Demsar,Mikhail Fonin,Mike Hettich,Jan Mayer,Martin Schubert,Thomas Dekorsy, K Samwer,Hanjo Schafer, Alexej Laptev

19th International Conference on Ultrafast Phenomena (2014), paper 07.Mon.P1.41（2014）

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摘要

We investigate undoped and Co-doped NiMnGa magnetic shape memory alloys by ultrafast spectroscopy. The temperature dependence of collective modes is explained on the base of a charge-density-wave excitation shining new light on the phase transition.

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