We report on the magnetic and magnetocaloric properties of GdFeSi, as obtained from DC magnetisation and specific heat measurements, in applied fields up to 9 Tesla and in a temperature range between 3 and 300 K. The compound orders ferromagnetically at 118 K. In the paramagnetic range it follows the Curie-Weiss law with mu(eff) = 8.68 mu(B) and theta(c) = + 122 K. At 5 K a saturation magnetic moment of 6.16 mu(B) was found, while the spontaneous magnetic moment is 6.11 mu(B.) From thermodynamic measurements the adiabatic temperature rise for an applied field of 9 T was Delta T = 4.5 K and the refrigerant capacity of the compound in the 10-160 K temperature range was calculated to be 1940 J kg(-1). The value is comparable with the one reported for Gd5Ge4 of 780 J kg(-1) in the temperature span 10-50 K for an applied magnetic field of 5 Tesla.
Magnetic properties and the magnetocaloric effect in the intermetallic compound GdFeSi
CANEPA, FABIO MICHELE;MANFRINETTI, PIETRO;
2000-01-01
Abstract
We report on the magnetic and magnetocaloric properties of GdFeSi, as obtained from DC magnetisation and specific heat measurements, in applied fields up to 9 Tesla and in a temperature range between 3 and 300 K. The compound orders ferromagnetically at 118 K. In the paramagnetic range it follows the Curie-Weiss law with mu(eff) = 8.68 mu(B) and theta(c) = + 122 K. At 5 K a saturation magnetic moment of 6.16 mu(B) was found, while the spontaneous magnetic moment is 6.11 mu(B.) From thermodynamic measurements the adiabatic temperature rise for an applied field of 9 T was Delta T = 4.5 K and the refrigerant capacity of the compound in the 10-160 K temperature range was calculated to be 1940 J kg(-1). The value is comparable with the one reported for Gd5Ge4 of 780 J kg(-1) in the temperature span 10-50 K for an applied magnetic field of 5 Tesla.
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