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Title: Phonon softening in Ni-Mn-Ga alloys
Author: Mañosa, Lluís
Planes Vila, Antoni
Zarestky, Jerel L.
Lograsso, T. A.
Schlagel, D. L.
Stassis, C.
Keywords: Dispersió (Física nuclear)
Scattering (Physics)
Issue Date: 2001
Publisher: The American Physical Society
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.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 2001, vol. 64, núm. 2, p. 024305(1)-024305(6)
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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