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Tailoring of magnetocaloric effect in Ni Ni 45.5Mn 43.0In 11.5 metamagnetic shape memory alloy

We investigate the direct and inverse magnetocaloric effect in Ni 45.5Mn 43.0In 11.5 Heusler alloy ribbons comparing the results obtained for the as-quenched sample with the ones after different annealing procedures. An enhancement and shift of the entropy maximum to near room temperature is observed in all annealed samples. A remarkable magnetocaloric effect is observed in samples with short-time treatment (10 minutes) and at the lowest annealing temperature. We show that the suppressing of uncompensated martensitic transition and thermal hysteresis are both influenced by the heat treatment. Also, an improvement on Curie’s temperature is observed and, at low magnetic field, it has been risen up to 310K. Our results demonstrate that the martensitic transformation is highly sensitive to the applied magnetic field and also to the annealing treatment, which means that the magnetocaloric effect can be tuned showing different behaviors for each sample

Authors are thankful to Spanish MICINN for financial support: MAT2009-13108-C02-01-02 and MAT2010-20798-C05-04

Hindawi Publishing Corporation

Autor: Rosa, W. O.
González-Legarreta, L.
García Fernández, Javier
Sánchez, T.
Vega, V.
Escoda i Acero, Ma. Lluïsa
Suñol Martínez, Joan Josep
Santos, J.D.
Alves, M. JP.
Sommer, R.L.
Prida, V.M.
Hernando, Blanca
Resum: We investigate the direct and inverse magnetocaloric effect in Ni 45.5Mn 43.0In 11.5 Heusler alloy ribbons comparing the results obtained for the as-quenched sample with the ones after different annealing procedures. An enhancement and shift of the entropy maximum to near room temperature is observed in all annealed samples. A remarkable magnetocaloric effect is observed in samples with short-time treatment (10 minutes) and at the lowest annealing temperature. We show that the suppressing of uncompensated martensitic transition and thermal hysteresis are both influenced by the heat treatment. Also, an improvement on Curie’s temperature is observed and, at low magnetic field, it has been risen up to 310K. Our results demonstrate that the martensitic transformation is highly sensitive to the applied magnetic field and also to the annealing treatment, which means that the magnetocaloric effect can be tuned showing different behaviors for each sample
Authors are thankful to Spanish MICINN for financial support: MAT2009-13108-C02-01-02 and MAT2010-20798-C05-04
Accés al document: http://hdl.handle.net/2072/270716
Llenguatge: eng
Editor: Hindawi Publishing Corporation
Drets: Attribution 3.0 Spain
URI Drets: http://creativecommons.org/licenses/by/3.0/es/
Matèria: Metalls de transició -- Aliatges
Transition metals -- Alloys
Aliatges
Alloys
Metalls de transició -- Aliatges
Transition metals -- Alloys
Títol: Tailoring of magnetocaloric effect in Ni Ni 45.5Mn 43.0In 11.5 metamagnetic shape memory alloy
Tipus: info:eu-repo/semantics/article
Repositori: Recercat

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