2026-04-18T06:13:17Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/188182024-06-18T11:51:04Zcom_2072_452955com_2072_2054col_2072_453063

Martensitic Transformation, Thermal Analysis and Magnetocaloric Properties of Ni-Mn-Sn-Pd Alloys Wederni, Asma Ipatov, Mihail Pineda, Eloi Escoda i Acero, Ma. Lluïsa González, Julian-Maria Khitouni, Mohamed Suñol Martínez, Joan Josep Metalls -- Aliatges Metals -- Alloys Transformacions martensítiques Martensitic transformations Aliatges amb memòria de forma Shape memory alloys Martensitic transition and magnetic response of Ni50−x Pdx,y Mn36 Sn14−y (x = 0, 1, 2 and y = 0, 1) Heusler alloys were analysed. The crystalline structure of each composition was solved by X-ray diffraction pattern fitting. For x = 1 and 2, the L21 austenite structure is formed and, for y = 1, the crystallographic phase is a modulated martensitic structure. From differential scanning calorimetry scans, we determine characteristic transformation temperatures and the entropy/enthalpy changes. The temperatures of the structural transformation increase with the addition of Pd to replace Ni or Sn, whereas the austenitic Curie temperature remains almost unvarying. In addition, the magneto-structural transition, investigated by magnetic measurements, is adjusted by suitable Pd doping in the alloys. The peak value of the magnetic entropy changes reached 4.5 J/(kg K) for Ni50Mn36Sn13Pd1 (external field: 50 kOe) This research was funded by MINECO grant MAT2016-75967-P and UdG grant PONT2020/01 2024-06-18T11:51:04Z 2024-06-18T11:51:04Z 2024-06-18T11:51:04Z 2020-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion peer-reviewed http://hdl.handle.net/10256/18818 info:eu-repo/semantics/altIdentifier/doi/10.3390/pr8121582 info:eu-repo/semantics/altIdentifier/issn/2227-9717 info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/MAT2016-75967-P/ES/ALEACIONES CON MEMORIA DE FORMA ACTIVADA POR CAMPO MAGNÉTICO EN MICROESCALA/ Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess MDPI (Multidisciplinary Digital Publishing Institute) Processes, 2020, vol. 8, núm. 12, p. 1582 Articles publicats (D-F)