THE EFFECT OF SOME FACTORS ON THE ELECTRI C PROPERTIES OF RARE-EARTH COMPLEX OXIDE

The rare earth complex oxides with different types have been synthesiz ed. Their structures and electric properties have been investigated. A ccording to our experimental results, the effects of the outest shell electronic configuration, electron spin state, electron transport path and formation of cluster on the electric properties of rare earth com plex oxides have been summarized. When the electrons in the outest she ll of the central metallic ion are unpair, and the outest shell is not half-filled, the electric conductibilities of these compounds are bet ter, If there is a -M-X-M-X- or -M-M-M- (the distances between two ato ms <0.31 nm) continuous electron transport path, and the electron conf igurations of the central metallic ion conform to the above condition, then the electric conductibilities are good, The isolate cluster can not become the continuous electron transport path, therefore, the form ation of the isolate cluster will reduce the conductibility.