Mañosa, LluísPlanes Vila, AntoniZarestky, Jerel L.Lograsso, T. A.Schlagel, D. L.Stassis, C.2009-12-242009-12-2420010163-1829https://hdl.handle.net/2445/10500The 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.6 p.application/pdfeng(c) The American Physical Society, 2001Dispersió (Física nuclear)FononsAliatgesScattering (Physics)PhononsAlloysinfo:eu-repo/semantics/article186004info:eu-repo/semantics/openAccess