Sr-Cd-Cu-Oセラミックの電気抵抗の異常

概要

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It has been found that Sr_xCd_<1-x>CuO_y ceramics show a peak of resistivity at about 240 K, when x>0.20. The peak height becomes larger with an increase of x value. This peak is considered to be attributed to Sr-Cu-O phase, existing near grain-boundaries within ceramics. The carriers arise from the CdO, involved in the Sr-Cu-O phase, but the mechanism is yet to be made clear. This anomaly may be associated with the spin excitation of a spin gap, because both happen near the same temperature.
東海大学の論文
1997-03-30