Pressure-induced suppression of ferromagnetism in CePd$_2$P$_2$

Abstract

The correlated electron material CePd 2 P 2 crystallizes in the ThCr 2 Si 2 structure and orders ferromagnetically at 29 K. Lai et al. [1] found evidence for a ferromagnetic quantum critical point induced by chemical compression via substitution of Ni for Pd. However, disorder effects due to the chemical substitution interfere with a simple analysis of the possible critical behavior. In the present work, we examine the temperature -pressure -magnetic field phase diagram of single crystalline CePd 2 P 2 to 25 GPa using a combination of resistivity, magnetic susceptibility, and x-ray diffraction measurements. We find that the ferromagnetism appears to be destroyed near 12 GPa, without any change in the crystal structure.