A is at least one kind of element selected from the group consisting of Al and {HEAD ~ Ga}, the element D is Si and {TAIL ~ Ge}, and the element Z is at least one kind of element selected from the rare earth elements and the transitional metal elements 
A is at least one kind of element selected from the group consisting of Al and { HEAD ~ Ga } , the element D is Si and { TAIL ~ Ge } , and the element Z is at least one kind of element selected from the rare earth elements and the transitional metal elements
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH