Lattice dynamics and phonon softening in Ni-Mn-Al Heusler alloys

Xavier Moya; Lluís Mañosa; Antoni Planes; Thorsten Krenke; Mehmet Acet; V. O. Garlea; T. A. Lograsso; D. L. Schlagel; J. L. Zarestky

doi:10.1103/PhysRevB.73.064303

Lattice dynamics and phonon softening in Ni-Mn-Al Heusler alloys

Xavier Moya, Lluís Mañosa, Antoni Planes, Thorsten Krenke, Mehmet Acet, V. O. Garlea, T. A. Lograsso, D. L. Schlagel, J. L. Zarestky

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

Inelastic and elastic neutron scattering have been used to study a single crystal of the Ni54 Mn23 Al23 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 number ξ0 =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.

Original language	English
Article number	064303
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	73
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.73.064303
State	Published - 2006
Externally published	Yes

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title = "Lattice dynamics and phonon softening in Ni-Mn-Al Heusler alloys",

abstract = "Inelastic and elastic neutron scattering have been used to study a single crystal of the Ni54 Mn23 Al23 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 number ξ0 =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.",

author = "Xavier Moya and Llu{\'i}s Ma{\~n}osa and Antoni Planes and Thorsten Krenke and Mehmet Acet and Garlea, \{V. O.\} and Lograsso, \{T. A.\} and Schlagel, \{D. L.\} and Zarestky, \{J. L.\}",

year = "2006",

doi = "10.1103/PhysRevB.73.064303",

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journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

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T1 - Lattice dynamics and phonon softening in Ni-Mn-Al Heusler alloys

AU - Moya, Xavier

AU - Mañosa, Lluís

AU - Planes, Antoni

AU - Krenke, Thorsten

AU - Acet, Mehmet

AU - Garlea, V. O.

AU - Lograsso, T. A.

AU - Schlagel, D. L.

AU - Zarestky, J. L.

PY - 2006

Y1 - 2006

N2 - Inelastic and elastic neutron scattering have been used to study a single crystal of the Ni54 Mn23 Al23 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 number ξ0 =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.

AB - Inelastic and elastic neutron scattering have been used to study a single crystal of the Ni54 Mn23 Al23 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 number ξ0 =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.

UR - https://www.scopus.com/pages/publications/33144466661

U2 - 10.1103/PhysRevB.73.064303

DO - 10.1103/PhysRevB.73.064303

M3 - Article

AN - SCOPUS:33144466661

SN - 1098-0121

VL - 73

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 6

M1 - 064303

ER -

Lattice dynamics and phonon softening in Ni-Mn-Al Heusler alloys

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