Superconducting Dy(IrxRh1−x)4B4 system

The boundaries between the paramagnetic, superconducting and magnetically-ordered phases in the pseudoternary system Dy(Ir_xRh_1?x)₄B₄ have been established down to 1.2 K. Comparisons between the present system and other pseudoternary systems M(Ir_xRh_1?x)₄B₄ show that the depression of the superconducting transition temperature (ΔT_c), relative to the nonmagnetic Lu compounds, can be described qualitatively by the de Gennes factor (g?1)²J(J+1). The nature of the magnetic order for the Rh-rich compounds was investigated by means of low field measurements and seems to be different from simple ferromagnetism.