Non-contact direct measurement of the magnetocaloric effect in thin samples

An experimental setup, based on a non-contact temperature sensor, is proposed to directly measure the magnetocaloric effect of samples few micrometers thick. The measurement of the adiabatic temperature change of foils and ribbons is fundamental to design innovative devices based on magnetocaloric t...

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Bibliographic Details
Published in:Review of scientific instruments 2014-07, Vol.85 (7), p.074902-074902
Main Authors: Cugini, F, Porcari, G, Solzi, M
Format: Article
Language:English
Subjects:
Adiabatic flow
Bulk sampling
CALORIMETRY
COMPUTERIZED SIMULATION
Differential scanning calorimetry
Foils
GADOLINIUM
HEAT TRANSFER
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
MAGNETIC PROPERTIES
Micrometers
MICROSTRUCTURE
RELIABILITY
Scientific apparatus & instruments
SENSORS
TEMPERATURE MEASUREMENT
Temperature sensors
THERMODYNAMIC PROPERTIES
THIN FILMS
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Summary:An experimental setup, based on a non-contact temperature sensor, is proposed to directly measure the magnetocaloric effect of samples few micrometers thick. The measurement of the adiabatic temperature change of foils and ribbons is fundamental to design innovative devices based on magnetocaloric thin materials or micro-structuring bulk samples. The reliability of the proposed setup is demonstrated by comparing the measurements performed on a bulk gadolinium sample with the results obtained by an experimental setup based on a Cernox bare chip thermoresistance and by in-field differential scanning calorimetry. We show that this technique can measure the adiabatic temperature variation on gadolinium sheets as thin as 27 μm. Heat transfer simulations are added to describe the capability of the presented technique.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4890394