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Martensitic transition and structural modulations in the Heusler alloy Ni2FeGa

✍ Scribed by J.Q. Li; Z.H. Liu; H.C. Yu; M. Zhang; Y.Q. Zhou; G.H. Wu

Publisher: Elsevier Science
Year: 2003
Tongue: English
Weight: 584 KB
Volume: 126
Category: Article
ISSN: 0038-1098
DOI: 10.1016/s0038-1098(03)00144-3

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✦ Synopsis

We have found two distinctive structural modulations altering evidently along with the martensitic transition (MT) in the Ni 2 FeGa alloy. The first one ðq 1 Þ; corresponding to the well-known phonon anomalies in the ½zz0 TA 2 branch, occurs along the k110l direction. The second one ðq 2 Þ; an incommensurate modulation observed for the first time, occurs along the k211ldirection. Both modulations change gradually with the premartensitic phonon softening and discontinuously with the MT. Anomalies in magnetic properties emerging around the MT have been briefly discussed.

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