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Article
Phonon softening in Ni-Mn-Ga alloys
Physical Review B
Document Type
Article
Disciplines
Publication Date
6-21-2001
DOI
10.1103/PhysRevB.64.024305
Abstract
The TA2 phonon dispersion curves of Ni-Mn-Ga alloys with different compositions which transform to different martensitic structures have been measured over a broad temperature range covering both paramagnetic and ferromagnetic phases. The branches show an anomaly (dip) at a wave number that depends on the particular martensitic structure, and there is softening of these anomalous phonons with decreasing temperature. This softening is enhanced below the Curie point, as a consequence of spin-phonon coupling. This effect is stronger for systems with higher electronic concentration.
Copyright Owner
American Physical Society
Copyright Date
2001
Language
en
File Format
application/pdf
Citation Information
Lluís Mañosa, Antoni Planes, Jerel L. Zarestky, Thomas A. Lograsso, et al.. "Phonon softening in Ni-Mn-Ga alloys" Physical Review B Vol. 64 Iss. 21 (2001) p. 024305 Available at: http://works.bepress.com/thomas_lograsso/108/
This article is from Physical Review B 64 (2001): 024305, doi:10.1103/PhysRevB.64.024305.