Magnetic phase diagrams of [formula omitted] ( [formula omitted] and 0.5)

Abstract

DyB 2 C 2 with an antiferroquadrupolar (AFQ) transition at T Q = 24.7 K was diluted by non-magnetic Y and examined by specific heat experiments under magnetic fields in order to elucidate its magnetic phase transition behavior. Basically, the phase diagram of Dy 0.4 Y 0.6 B 2 C 2 is similar to that of DyB 2 C 2 . In Dy 0.5 Y 0.5 B 2 C 2 , the AFQ transition occurs simultaneously with the antiferromagnetic transition at T N .