Phonon softening in Ni2MnGa with high martensitic transition temperature

Authors
Stuhr, U Vorderwisch, P Kokorin, VV
Citation
U. Stuhr et al., Phonon softening in Ni2MnGa with high martensitic transition temperature, J PHYS-COND, 12(34), 2000, pp. 7541-7545
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN journal
09538984 → ACNP
Volume
12
Issue
34
Year of publication
2000
Pages
7541 - 7545
Database
ISI
SICI code
0953-8984(20000828)12:34<7541:PSINWH>2.0.ZU;2-F
Abstract
Phonon softening in the Heusler alloy Ni2MnGa crystal was investigated by n eutron spectroscopy for a crystal where the martensitic phase transformatio n temperature is close to the Curie temperature. The main result is a softe ning of the TA(2)-phonon branch (xi xi 0) of the cubic phase in a broad ran ge between xi = 0.1 and 0.4 when the temperature approaches the phase trans formation. The behaviour of the present sample is compared with results for samples with lower transition temperature.