Antiferromagnetic Kondo lattice compound CePt$_{3}$P

TL;DR

CePt₃P is a newly synthesized antiferromagnetic Kondo lattice with no superconductivity, exhibiting magnetic order, Kondo effect, and field-induced spin-flop transition, expanding understanding of heavy fermion systems.

Contribution

This work reports the synthesis and characterization of CePt₃P, revealing its unique coexistence of antiferromagnetism, Kondo effect, and structural features related to superconducting platinum compounds.

Findings

No superconductivity observed down to 0.5 K.

Coexistence of antiferromagnetic order and Kondo effect.

Field-induced spin-flop transition below 3.0 K.

Abstract

A new ternary platinum phosphide CePt$_{3}$P was synthesized and characterized by means of magnetic, thermodynamic and transport measurements. The compound crystallizes in an antiperovskite tetragonal structure similar to that in the canonical family of platinum-based superconductors $A$Pt$_{3}$P ($A$ = Sr, Ca, La) and closely related to the noncentrosymmetric heavy fermion superconductor CePt$_{3}$Si. In contrast to all the superconducting counterparts, however, no superconductivity is observed in CePt$_{3}$P down to 0.5 K. Instead, CePt$_{3}$P displays a coexistence of antiferromagnetic ordering, Kondo effect and crystalline electric field effect. A field-induced spin-flop transition is observed below the magnetic ordering temperature $T_{N1}$ of 3.0 K while the Kondo temperature is of similar magnitude as $T_{N1}$. The obtained Sommerfeld coefficient of electronic specific heat is ${\gamma}_{Ce}$ = 86 mJ/molK$^{2}$ indicating that CePt$_{3}$P is a moderately correlated antiferromagnetic Kondo lattice compound.