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  Effect of chemical and external hydrostatic pressure on magnetic and magnetocaloric properties of Pt doped Ni2MnGa shape memory Heusler alloys

Sivaprakash, P., Esakki Muthu, S., Singh, A. K., Dubey, K. K., Kannan, M., Muthukumaran, S., et al. (2020). Effect of chemical and external hydrostatic pressure on magnetic and magnetocaloric properties of Pt doped Ni2MnGa shape memory Heusler alloys. Journal of Magnetism and Magnetic Materials, 514: 167136, pp. 1-7. doi:10.1016/j.jmmm.2020.167136.

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 Urheber:
Sivaprakash, P.1, Autor
Esakki Muthu, S.1, Autor
Singh, Anupam K.1, Autor
Dubey, K. K.1, Autor
Kannan, M.1, Autor
Muthukumaran, S.1, Autor
Guha, Shampa1, Autor
Kar, Manoranjan1, Autor
Singh, Sanjay2, Autor           
Arumugam, S.1, Autor
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              

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Schlagwörter: Heusler alloys, Hydrostatic pressure, Magnetocaloric effect, Martensite transition, Shape Memory alloys, Entropy, Gallium alloys, Hydraulics, Hydrostatic pressure, Manganese alloys, Martensite, Platinum, Pressure effects, Shape memory effect, Ternary alloys, Applied magnetic fields, Effect of chemicals, External hydrostatic pressures, External pressures, Magnetic entropy change, Magnetocaloric effect (MCE), Magnetocaloric properties, Thermal hysteresis, Magnetocaloric effects
 Zusammenfassung: The magnetocaloric effect (MCE) on Ni2−xPtxMnGa (x = 0.2, 0.3 and 1.0) shape memory Heusler alloys around martensite phase transition temperature (TM) is investigated by varying chemical pressure (Pt concentration). The magnetic entropy change (ΔSM) decreases with increasing chemical pressure for various external applied magnetic fields up to 3 T, and the width of thermal hysteresis increases with the increases of Pt concentration. The effect of hydrostatic pressure on both TM and ΔSM for Ni1.8Pt0.2MnGa is also investigated. We observed that the application of hydrostatic pressure increases TM (3.5 K/GPa) and stabilizes the martensite phase. The maximum magnetic entropy change (ΔSmax) of 9.31 J Kg−1 K-1is observed for a field change of 9 T at ambient pressure for Ni1.8Pt0.2MnGa. Further, the application of external pressure leads to the decrease of ΔSmax to 5.52 J Kg−1 K−1 at 0.91 GPa. © 2020 Elsevier B.V.

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Sprache(n): eng - English
 Datum: 2020-06-122020-06-12
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1016/j.jmmm.2020.167136
 Art des Abschluß: -

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Titel: Journal of Magnetism and Magnetic Materials
  Andere : Journal of Magnetism and Magnetic Materials: MMM
  Kurztitel : J. Magn. Magn. Mater.
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Amsterdam : NH, Elsevier
Seiten: - Band / Heft: 514 Artikelnummer: 167136 Start- / Endseite: 1 - 7 Identifikator: ISSN: 0304-8853
CoNE: https://pure.mpg.de/cone/journals/resource/954925512464