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Effect of high-temperature quenching on the magnetostructural transformations and the long-range atomic order of Ni-Mn-Sn and Ni-Mn-Sb metamagnetic shape memory alloys

AuthorsSánchez-Alarcos, V.; Pérez-Landazábal, J. I.; Recarte, V.; Rodríguez-Velamazán, J. A.
KeywordsMartensitic transformation
Atomic order
Metamagnetic shape memory alloys
Issue Date2013
CitationActa Materialia 61(12): 4676-4682 (2013)
AbstractThe influence of high-temperature thermal treatments on the martensitic transformation and the magnetic properties of Ni-Mn-Sn and Ni-Mn-Sb metamagnetic shape memory alloys have been investigated by calorimetric and magnetic measurements. Contrary to Ni-Mn-Ga and Ni-Mn-In systems, the martensitic transformation and Curie temperatures of Ni-Mn-Sn and Ni-Mn-Sb alloys are found to be unaffected by the increasing quenching temperature. Neutron diffraction measurements confirm the null effect of quenching on the next-nearest-neighbors atomic order due to the negligible L21 atomic disorder achieved with high-temperature annealings. The analysis of long-range order also suggests that no L21-B2 ordering transition takes place in the studied alloys, thus indicating an unusually high stability of the L21 structure. The obtained results show that the magnetostructural properties of Ni-Mn-Sn and Ni-Mn-Sb alloys cannot be properly tuned by means of standard thermal treatments. © 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Descriptionet al.
Identifiersdoi: 10.1016/j.actamat.2013.04.040
issn: 1359-6454
Appears in Collections:(ICMA) Artículos
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