| 摘要 |
Specific embodiments of magnetocaloric materials useful in magnetic refrigeration systems, for example, are disclosed. The magnetocaloric materials include nickel-manganese-gallium (NiMnGa) alloys in which substitution is made from some of the manganese. Copper is preferably substituted for at least some of the manganese, but cobalt or a combination of cobalt and copper could also be substituted for at least some of the manganese. In the preferred embodiment, the material comprises a nickel-manganese-copper-gallium of the composition Ni<SUB>2</SUB>Mn<SUB>1-x</SUB>Cu<SUB>x</SUB>Ga, where x is greater than or equal to about 0.22.
|
