Esr And Superconductivity Of Nd3+ And Gd3+ In Zrir2

Abstract

We report low temperatures ESR and Superconductivity experiments on Nd3+ and Gd3+ in the superconducting cubic intermetallic compound ZrIr2. The ratio of the squares of the effective 4f-conduction electron exchange parameters corresponding to Nd3+ and Gd3+ ( J2 s-Nd J2 s-Gd) were extracted both from the thermal broadening of the ESR linewidths and from the initial depression of the superconducting critical temperature, and were found to be comparable. Nd3+ was found to have a larger exchange parameter than of Gd3+. © 1981.