Resistivity and susceptibility studies on UPd_2−xPt_xAl₃ (x=0, 0.1, 0.2, 0.3, and 0.5)

Abstract

In this Brief Report, we report the effect of Pt substitution for Pd in the heavy-electron superconductor UPd₂Al₃. We find that the antiferromagnetic ordering temperature T_N=14.5 K (for x=0) does not change with Pt substitution up to x=0.5. The PrNi₂Al₃ structure, which is already reported, does not form when x>0.5. Even though there is no change in T_N, the superconducting transition temperature T_c rapidly decreases with Pt substitution for Pd in UPd₂Al₃. This is in contrast with the recent study of Ni substitution for Pd in the same compound.