Convergence of direct and indirect methods in the magnetocaloric study of first order transformations: The case of Ni-Co-Mn-Ga Heusler alloys
Authors:
- G. PorcariGPG. Porcari
- F. CuginiFCF. Cugini
- S. FabbriciSFS. Fabbrici
- C. PernecheleCPC. Pernechele
- F. AlbertiniFAF. Albertini
- M. BuzziMBM. Buzzi
- M. MangiaMMM. Mangia
- M. SolziMSM. Solzi
- 27 September 2012
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 86 (10)
Abstract
The study of two aspects of the magnetocaloric effect (MCE), namely, the matching between isothermal entropy change and direct adiabatic temperature change, is not straightforward since huge differences between these two quantities have often been reported. Here we put in relation the direct and indirect measurements on the first order magnetostructural martensitic transformation occurring in Ni-Co-Mn-Ga alloys. In order to complete the characterization of the MCE and to find an explanation of these mismatches, differential scanning calorimeter measurements have been performed at different applied magnetic fields.Keywords
This publication has 35 references indexed in Scilit:
- Giant magnetocaloric effect driven by structural transitionsNature Materials, 2012
- Innovative ideas for future research on magnetocaloric technologiesInternational Journal of Refrigeration, 2010
- Reverse magnetostructural transformation in Co-doped NiMnGa multifunctional alloysApplied Physics Letters, 2009
- Magnetocaloric effect and its relation to shape-memory properties in ferromagnetic Heusler alloysJournal of Physics: Condensed Matter, 2009
- Giant entropy change at the co-occurrence of structural and magnetic transitions in the Ni $ \mathsf {_{2.19}}$ Mn $ \mathsf {_{0.81}}$ Ga Heusler alloyThe European Physical Journal B, 2003
- Itinerant-electron metamagnetic transition and large magnetocaloric effects in compounds and their hydridesPhysical Review B, 2003
- Transition-metal-based magnetic refrigerants for room-temperature applicationsNature, 2002
- Giant magnetocaloric effect of MnAs1−xSbxApplied Physics Letters, 2001
- Thermodynamics of the magnetocaloric effectPhysical Review B, 2001
- Giant Magnetocaloric Effect inPhysical Review Letters, 1997