Pressure effect on the electrical properties of R7Rh3 (R = Dy and Y) (original) (raw)
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Difference in the transport properties between Y 7Rh 3 and La 7Rh 3
Physica B-condensed Matter - PHYSICA B, 2003
Transport, thermodynamic and magnetic properties in La7Rh3 and Y7Rh3 were examined. The results indicate that La7Rh3 is metallic and becomes superconducting below 2.5K. In contrast, Y7Rh3 shows anomalous transport properties with a broad maximum around 200K and a negative temperature coefficient of electrical resistivity at higher temperature. The number of carrier in Y7Rh3 is less than that in La7Rh3, while the electron correlation of Y7Rh3 is stronger than that of La7Rh3. Thus the contrastive physical properties between light- and heavy-rare-earth R7Rh3 might be originated in both the difference of the number of carrier and strength electron correlation owing to change in the lattice constants.
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