Superconducting and Ferromagnetic Properties of PrxCe1-xRu2

The specific heat of Pr x Ce 1- x Ru 2 (\(0.0{}x{}0.4\)) were measured from 1.3 to 20 K. The effective electron-electron interaction in BCS theory decreases monotonically with increasing x . The increase of the superconducting transition temperature for low Pr concentrations depends mainly on the increase of the γ value. The magnetic contribution to the specific heat was observed for \(x{}0.2\). The transition to the superconducting state becomes broad abruptly beyond x =0.3, which is related to the magnetic ordering of Pr. The magnetic properties were measured for \(0.0{}x{}1.0\). Praseodymium possesses the magnetic moment of 3.57 µ B for all alloys. This value is very close to that of Pr 3+ . In this alloy system the magnetic interaction destroys the superconductivity before the ferromagnetism occurs.