Journal
APPLIED PHYSICS LETTERS
Volume 113, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5061929
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- Fondazione Cariparma
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In this work, we report on the direct measurement of the magnetic field induced temperature change in a series of micrometric thick ribbons of Ni-Mn-In-Sn Heusler alloys, performed with an innovative experimental technique based on the thermo-optical Mirage Effect. The technique combines very fast measurement time, 1 T pulsed magnetic field in the millisecond range, and con-tactless temperature detection. These features make the technique ideal for the characterization of thin samples with a thickness down to a few micrometers. In this work, we demonstrate this by directly measuring the magnetocaloric effect (MCE) of micrometric-thick ribbons of Heusler alloys at the Curie transition, which was tuned on a wide temperature range by varying the Sn to In ratio. The direct test of the MCE in thin samples is fundamental for the development of refrigerant elements with a large heat-transfer coefficient and for the design of solid state micro devices for cooling and energy harvesting. Published by AIP Publishing.
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