1. Magnetocaloric properties of amorphous GdNiAl obtained by mechanical grinding
- Author
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J.-L. Bobet, J. Sanchez Marcos, Bernard Chevalier, J.C. Gómez Sal, J. Rodríguez Fernández, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), Departamento de ciencias de la tierra y física de la materia condensada (CITIMAC), and Universidad de Cantabria [Santander]-Facultad de Ciencias
- Subjects
010302 applied physics ,PACS : 75.30.Sg ,65.40.+g ,75.50.Kj ,Materials science ,Magnetocaloric effect ,Metallurgy ,Intermetallic ,Thermodynamics ,[CHIM.MATE]Chemical Sciences/Material chemistry ,02 engineering and technology ,General Chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Isothermal process ,Grinding ,Amorphous solid ,Magnetization ,Ferromagnetism ,magnetic cooling ,0103 physical sciences ,Magnetic refrigeration ,Curie temperature ,General Materials Science ,Amorphous and quasicrystalline magnetic materials ,0210 nano-technology - Abstract
An amorphous GdNiAl sample was prepared by mechanical grinding performed on a crystallised intermetallic. The treatment changes greatly the ferromagnetic behaviour of this compound; its Curie temperature decreases from 57 K (unmilled sample) to 29 K (milled sample). Specific heat and magnetisation measurements reveal that amorphous GdNiAl exhibits an interesting magnetocaloric effect; for an applied magnetic field of 5 T a change of ≅8.9 J/kg K is observed at 36 K for the isothermal magnetic entropy.
- Published
- 2005
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