Evolution of the partially frustrated magnetic order in CePd${}_{1-x}$Ni${}_x$Al

Abstract

We report on a single-crystal neutron diffraction study of the evolution of the antiferromagnetic order in the heavy-fermion compound CePd${}_{1-x}$Ni${}_x$Al which exhibits partial geometric frustration due to its distorted Kagomé structure. The magnetic structure is found to be unchanged with a propagation vector $Q_{\mathrm{AF}}\approx (0.500.35)$ for all Ni concentrations $x$ up to $x_c\approx 0.14$. Upon approaching the quantum critical concentration $x_c$, the ordered moment vanishes linearly with Néel temperature $T_{\mathrm{N}}$, in good agreement with CePdAl under hydrostatic pressure. For all Ni concentrations, substantial short-range magnetic correlations are observed above $T_{\mathrm{N}}$ as a result of frustration.

6 pages, 4 figures

References in corpus (7)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Frustration and the Kondo effect in heavy fermion materials
• Entropy evolution in the magnetic phases of partially frustrated CePdAl
• From itinerant to local-moment antiferromagnetism in Kondo lattices: Adiabatic continuity vs. quantum phase transitions
• Temperature-field phase diagram of geometrically frustrated CePdAl
• Signature of frustrated moments in quantum critical CePd${}_{1-x}$Ni${}_x$Al
• Thermodynamic Investigation of Metamagnetic Transitions and Partial Disorder in the Quasi-Kagome Kondo Lattice CePdAl

Cited by in corpus (3)

• Spin-liquid signatures in the quantum critical regime of pressurized CePdAl
• Frustration-induced quantum criticality in Ni-doped CePdAl as revealed by the $\mu$SR technique
• Quantitative investigation of the 4$f$ occupation in the quasikagome Kondo lattice CeRh${}_{1-x}$Pd${}_x$Sn