Borocarbide Superconductors

摘要

Recently discovered intermetallic Rni_2B_2C compounds show a wide variety of interesting physical properties depending upon R atom; compounds with R = Y, Lu are isotropic BCStype superconductors with moderately high Superconducting transition temperatures, R = Tm - Dy exhibit the coexistence of superconductivity with magnetic order and R = Yb behaves like a heavy fermion metal. Results on some of normal state transport properties, namely, electrical resistivity, absolute thermopower and Hall effect, and Superconducting properties of these compounds are discussed.