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http://hdl.handle.net/2445/10559
Title: | Lattice dynamics and phonon softening in Ni-Mn-Al Heusler alloys |
Author: | Moya Raposo, Xavier Mañosa, Lluís Planes Vila, Antoni Krenke, Thorsten Acet, Mehmet Garlea, V. O. Lograsso, T. A. Schlagel, D. L. Zarestky, Jerel L. |
Keywords: | Transformacions martensítiques Teoria dels reticles Fonons Martensitic transformations Lattice theory Phonons |
Issue Date: | 2006 |
Publisher: | The American Physical Society |
Abstract: | Inelastic and elastic neutron scattering have been used to study a single crystal of the Ni$_{54}$Mn$_{23}$Al$_{23}$ Heusler alloy over a broad temperature range. The paper reports the first experimental determination of the low-lying phonon dispersion curves for this alloy system. We find that the frequencies of the TA$_2$ modes are relatively low. This branch exhibits an anomaly (dip) at a wave number $\xi_{0} ={1/3}\approx 0.33$, which softens with decreasing temperature. Associated with this anomalous dip at $\xi_{0}$, an elastic central peak scattering is also present. We have also observed satellites due to the magnetic ordering. |
Note: | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.73.064303 |
It is part of: | Physical Review B, 2006, vol. 73, núm. 6, p. 064303.1-064303.6 |
URI: | http://hdl.handle.net/2445/10559 |
Related resource: | http://dx.doi.org/10.1103/PhysRevB.73.064303 |
ISSN: | 0163-1829 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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