A model for hysteresis and magnetocaloric effect in magnetic field driven phase transformations

Author

Basso, V. ; Sasso, C.P. ; LoBue, M. ; Bertotti, G.

Author_Institution

IEN Galileo Ferraris, Torino, Italy

fYear

2005

fDate

4-8 April 2005

Firstpage

1785

Lastpage

1786

Abstract

The application of the model that connects magnetization curves to the heat exchange along the hysteresis loop for magnetocaloric materials of the class Gd-Si-Ge alloys in which phase transformation take place was discussed. The hysteresis curves showed distinct transition from paramagnetic to ferromagnetic phase as the field is increased. The model parameters were determined by assuming a Gaussian Preisach distribution.

Keywords

ferromagnetic materials; ferromagnetic-paramagnetic transitions; gadolinium alloys; germanium alloys; heat transfer; magnetic hysteresis; magnetocaloric effects; paramagnetic materials; silicon alloys; Gaussian Preisach distribution; GdSiGe; heat exchange; hysteresis loop; magnetization curves; magnetocaloric effect; magnetocaloric materials; model parameters; paramagnetic-ferromagnetic phase transition; Entropy; Magnetic hysteresis; Magnetic materials; Magnetic separation; Magnetization; Maxwell equations; Paramagnetic materials; Production systems; Temperature dependence; Temperature distribution;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1464326

Filename

1464326