Abstract
Two new phases LaPdBi and CePdBi were obtained by growing single crystals in Bi flux. They adopt the tetragonal ZrCuSi-type structure and feature Bi-square nets and PbO-type PdBi layers with significant partial Pd occupancy. Bulk superconductivity at 2.1 K and metallic behavior above are observed in LaPdBi. A small residual resistance ratio (RRR) indicates a strong scattering effect induced by the Pd vacancies, which implies an -wave pairing symmetry in LaPdBi. The broadening of the resistivity transition was measured under different magnetic fields demonstrating a high upper critical field of 3 T. Hall effect measurements reveal dominantly electron-like charge carriers and single-band transport behavior in LaPdBi. The paramagnetic CePdBi is nonsuperconducting but shows antiferromagnetic ordering below 6 K.
- Received 26 August 2013
DOI:https://doi.org/10.1103/PhysRevB.88.144511
©2013 American Physical Society