Lattice dynamics in magnetic superelastic Ni-Mn-In alloys: Neutron scattering and ultrasonic experiments Lograsso, Thomas Moya, Xavier Schlagel, Deborah González-Alonso, David Mañosa, Lluís Planes, Antoni Garlea, V. Lograsso, Thomas Schlagel, Deborah Zarestky, Jerel Aksoy, Seda Acet, Mehmed
dc.contributor.department Ames Laboratory 2018-02-13T14:30:20.000 2020-06-29T23:27:50Z 2020-06-29T23:27:50Z Thu Jan 01 00:00:00 UTC 2009 2013-09-21 2009-06-30
dc.description.abstract <p>Neutron scattering and ultrasonic methods have been used to study the lattice dynamics of two single crystals of Ni-Mn-In Heusler alloys close to Ni<sub>50</sub>Mn<sub>34</sub>In<sub>16</sub> magnetic superelastic composition. The paper reports on the experimental determination of the low-lying phonon-dispersion curves and the elastic constants for this alloy system. We found that the frequencies of the TA<sub>2</sub> branch are relatively low and it exhibits a small dip anomaly at a wave number ξ<sub>0</sub>≈1/3, which softens with decreasing temperature. Associated with the softening of this phonon, we also observed the softening of the shear elastic constant C′=(C<sub>11</sub>−C<sub>12</sub>)/2. Both temperature softenings are typical for bcc-based solids which undergo martensitic transformations and reflect the dynamical instability of the cubic lattice against shearing of {110} planes along ⟨11̅ 0⟩ directions. Additionally, we measured low-lying phonon-dispersion branches and elastic constants in applied magnetic fields aimed to characterize the magnetoelastic coupling.</p>
dc.description.comments <p>This article is from<em> </em><em>Physical Review B</em> 79 (2009): 214118, doi:<a href="" target="_blank">10.1103/PhysRevB.79.214118</a>.</p>
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dc.identifier archive/
dc.identifier.articleid 1060
dc.identifier.contextkey 4611584
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_pubs/64
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 01:21:31 UTC 2022
dc.source.uri 10.1103/PhysRevB.79.214118
dc.subject.disciplines Condensed Matter Physics
dc.subject.disciplines Metallurgy
dc.title Lattice dynamics in magnetic superelastic Ni-Mn-In alloys: Neutron scattering and ultrasonic experiments
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 316ee29f-99a9-49bc-a048-0f43caf97aa5
relation.isAuthorOfPublication 220ce8a4-546b-4118-8d44-911799a0ffa1
relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
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