Direct observation of magnetocaloric effect by differential thermal analysis: Influence of experimental parameters

The magnetocaloric effect is the isothermal change of magnetic entropy and the adiabatic temperature change induced in a magnetic material when an external magnetic field is applied. In this work, we present an experimental setup to study this effect in metamagnetic transitions, using the differenti...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2012-08, Vol.407 (16), p.3305-3307
Main Authors: Rotstein Habarnau, Yamila, Bergamasco, Pablo, Sacanell, Joaquin, Leyva, Gabriela, Albornoz, Cecilia, Quintero, Mariano
Format: Article
Language:English
Subjects:
Adiabatic flow
Condensed matter
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Differential thermal analysis
Entropy
Exact sciences and technology
Information technology
Magnetic fields
Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Magnetocaloric effect, magnetic cooling
Mathematical analysis
Nonmetallic ferromagnetic materials
Physics
Ramps
Studies of specific magnetic materials
Thermal expansion
thermomechanical effects and density
Thermal properties of condensed matter
Thermal properties of crystalline solids
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Summary:The magnetocaloric effect is the isothermal change of magnetic entropy and the adiabatic temperature change induced in a magnetic material when an external magnetic field is applied. In this work, we present an experimental setup to study this effect in metamagnetic transitions, using the differential thermal analysis technique, which consists in measuring simultaneously the temperatures of the sample of interest and a reference one while an external magnetic field ramp is applied. We have tested our system to measure the magnetocaloric effect in La0.305Pr0.32Ca0.375MnO3, which presents phase separation effects at low temperatures (T
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2011.12.094