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Article
Lattice dynamics and phonon softening in Ni-Mn-Al Heusler alloys
Physical Review B
  • Xavier Moya, Universitat de Barcelona
  • Lluís Mañosa, Universitat de Barcelona
  • Antoni Planes, Universitat de Barcelona
  • Thorsten Krenke, Universität Duisburg-Essen
  • Mehmet Acet, Universität Duisburg-Essen
  • V. O. Garlea, Iowa State University
  • Thomas A. Lograsso, Iowa State University
  • Deborah L. Schlagel, Iowa State University
  • Jerel L. Zarestky, Iowa State University
Document Type
Article
Publication Date
2-16-2006
DOI
10.1103/PhysRevB.73.064303
Abstract

Inelastic and elastic neutron scattering have been used to study a single crystal of the Ni54Mn23Al23 Heusler alloy over a broad temperature range. The paper reports the experimental determination of the low-lying phonon dispersion curves for this alloy system. We find that the frequencies of the TA2 modes are relatively low. This branch exhibits an anomaly (dip) at a wave numberξ0=1∕3≈0.33, which softens with decreasing temperature. Associated with this anomalous dip at ξ0, an elastic central peak scattering is also present. We have also observed satellites due to the magnetic ordering.

Comments

This article is from Physical Review B 73 (2006): 064303, doi:10.1103/PhysRevB.73.064303.

Copyright Owner
American Physical Society
Language
en
Date Available
2013-09-23
File Format
application/pdf
Citation Information
Xavier Moya, Lluís Mañosa, Antoni Planes, Thorsten Krenke, et al.. "Lattice dynamics and phonon softening in Ni-Mn-Al Heusler alloys" Physical Review B Vol. 73 Iss. 6 (2006) p. 064303
Available at: http://works.bepress.com/thomas_lograsso/76/