Magnetostructural transitions and adiabatic temperature variation in polycrystal and single-crystal Ni2MnGa alloys
| Autor: | Carlo Paolo Sasso, L. Giudici, Deborah L. Schlagel, M. Pasquale, Thomas A. Lograsso, Stefano Besseghini, Elena Villa, Laura H. Lewis |
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| Zdroj: | Istituto nazionale di ricerca metrologica-IRIS Journal of applied physics 99 (2006). doi:10.1063/1.2162335 info:cnr-pdr/source/autori:Sasso, CP (1) ; Pasquale, M (1) ; Giudici (1), L; Besseghini, S (2) ; Villa, E (2) ; Lewis, LH (3) ; Lograsso, TA (4) ; Schlagel, DL (4)/titolo:Magnetostructural transitions and adiabatic temperature variation in polycrystal and single-crystal Ni2MnGa alloys/doi:10.1063%2F1.2162335/rivista:Journal of applied physics/anno:2006/pagina_da:/pagina_a:/intervallo_pagine:/volume:99 Journal of applied physics 99 (2006): 1–3. doi:10.1063/1.2162335 info:cnr-pdr/source/autori:C.P.Sasso, M.Pasquale, L.Giudici, S. Besseghini, E. Villa, L.H.Lewis, T.A. Lograsso, D.L.Schlegel/titolo:Magneto-structural transitions and adiabatic temperature variation in poly-and single-crystal Ni2MnGa alloys/doi:10.1063%2F1.2162335/rivista:Journal of applied physics/anno:2006/pagina_da:1/pagina_a:3/intervallo_pagine:1–3/volume:99 |
| DOI: | 10.1063/1.2162335 |
| Popis: | The magnetocaloric response of off-stoichiometric Ni2MnGa polycrystal and single-crystal samples with a Curie temperature coincident with the martensitic transition temperature was investigated. The direct measurement of temperature change (?Tad) during an adiabatic transformation under a maximum field variation ?H = 5.6×106 A/m (7 T) was performed. The polycrystalline sample shows a maximum ?Tad ? 1.5 K at a temperature close to the structural transition. The value of ?Tad and the 20 K span of the ?Tad peak encourage further studies of the effect of microstructure on the magnetocaloric response of Ni2MnGa. |
| Databáze: | OpenAIRE |
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