The Superconductivity in Re–B System

概要

論文の詳細を見る
We present here the low temperature electrical transport and magnetic properties of intermetallic rhenium boride compounds. We newly discovered the superconductivity of Re7B3 ($T_{\text{c}}=3.3$ K) and its superconducting properties were discussed. We also discussed the physical properties of Re3B ($T_{\text{c}}=4.8$ K), of which supreconductivity was discussed by Strukova et al. The crystal structures of these compounds (Re3B and Re7B3) are orthorhombic (space group $Cmcm$) and hexagonal ($P6_3/mc$), respectively, and have differnt B–B bonds each other. The magnetization ($M$–$H$) curves of these compounds show a typical type-II superconducting behavior. The lower critical field, $H_{\text{c1}}(0)$, the upper critical field, $H_{\text{c2}}(0)$ and the Ginzburg–Landau (GL) parameter, $\kappa$ are, 8 mT, 5.2 T and 35 for Re3B and 6 mT, 0.9 T and 17 for Re7B3.
2003-07-15