Development of New Functional Alloys with Heusler-type Structure-Their Phase Stability and Physical Properties-

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Phase stabilities and magnetic properties of the Co- and Ni-based functional Heusler alloys showing magnetic shape memory effect, magnetocaloric effect and half-metallic properties were investigated. By the present project, some new magnetic shape memory alloys, such as NiCoMnAl, FeMnGa and PdFeIn, have been developed and the magnetocaloric properties for the NiCoMnIn alloys have been evaluated. Furthermore, a new halh-metallic magnet Co_2(Ti, Fe)Al showing an excellent half-metallicity has been proposed.