Pyrochlore iridates having metallic conductivity and their...

Compositions – Electrically conductive or emissive compositions – Metal compound containing

Reexamination Certificate

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C252S06251C, C335S296000, C335S148000, C335S158000

Reexamination Certificate

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06946085

ABSTRACT:
The present invention was made to develop a new material possessing simultaneously the two properties of geometrically frustrated state having a magnetic controllability and good conductivity which leads to applications for electrical controllability and thermal storage. This object is achieved by the conductive material having the pyrochlore structure represented by the general formula R2Ir2O7, where R is a rare earth element or elements of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Y. When, especially, R is an element or elements of La, Ce, Pr, Nd, Pm, Sm and Eu, the material possesses metallic electrical conductivity, so that it is useful for magnetically controllable functional electronic materials and thermal storage materials having large thermal capacity.

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