Anomalies of electrical properties of Sm-cuprate oxides substituted with yttrium and iron oxides at low temperatures
- 37 Downloads
Samples of Sm2-xRxCuO4 (R=Y and Fe), for x=0.0 and 0.05, were prepared by standard solid-state reactions. The lattice parameters of the single-phase cuprates increased for the altered samples. The samples were studied by differential scanning calorimetry, scanning electron microscopy, electrical resistivity, and thermoelectric power measurements. The effect of substitution was found to increase compound stability, decrease the electrical resistivity, and change the sign of the thermoelectric power. The anisotropy field due to apical oxygen in the unaltered sample was not found.
Keywordselectrical resistivity low temperatures Sm-cuprate oxides substitution thermal analysis thermoelectric power
Unable to display preview. Download preview PDF.
- 1.H. Itoh and M. Kusuhashi: “Effect of Sintering Temperature on Tc and Phase Stability of Nd2−xCexCuO4 and Eu2−xCexCuO4,” Physica C, 1991, 919, pp. 185–89.Google Scholar
- 7.A.A. Stattar, A.M. Samy, and K.M. El-Shokrofy: “Effect of Y and Fe Substitution on the Electrical Properties of Sm2CuO4 at High Temperatures,” in Proc. 8th Int. Conf. on Ferrites, M. Abe, ed., Kyoto and Tokyo, Japan, September 18–21, 2000, pp. 281–83.Google Scholar
- 16.E.W. Gorter: “Saturation Magnetization and Crystal Chemistry of Ferrimagnetic Oxides,” Philips Res. Rep., 1954, 9, pp. 321–65.Google Scholar