Document Type

Article

Publication Date

2-16-2006

Journal or Book Title

Physical Review B

Volume

73

Issue

6

First Page

064303

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

File Format

application/pdf

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