Evolution of non-Kramers Doublets in Magnetic Field PrNi${}_2$Cd${}_{20}$ and PrPd${}_2$Cd${}_{20}$

Abstract

Praseodymium-based 1-2-20 cage compounds Pr$T_2{X}_{20}$ ($T$ is generally Ti, V, Nb, Ru, Rh, Ir; and $X$ is either Al, Zn or Cd) provide yet another platform to study non-trivial electronic states of matter ranging from topological and magnetic orders to unconventional multipolar orders and superconductivity. In this paper, we report measurements of the electronic heat capacity in two Pr-based 1-2-20 materials: PrNi${}_2$Cd${}_{20}$ and PrPd${}_2$Cd${}_{20}$. We find that the lowest energy multiplet of the Pr $4f^2$ valence configuration is a ${\Gamma }_3$ non-Kramers doublet and the first excited triplet is assumed to be a magnetic ${\Gamma }_5$. By analyzing the dependence of the energy splitting between the ground and first excited singlet states on external magnetic field, we found that the maximum in the heat capacity corresponding to the Schottky anomaly in PrPd${}_2$Cd${}_{20}$, unlike PrNi${}_2$Cd${}_{20}$, shows pronounced linear dependence on external magnetic field at higher field values. This effect is associated with the exchange interactions between the field-induced magnetic dipole moments.

References in corpus (13)

• Kondo Effects and Multipolar Order in the cubic PrTr2Al20 (Tr=Ti, V)
• Arrested Kondo effect and hidden order in URu_2Si_2
• Simultaneous Superconducting and Antiferroquadrupolar Transitions in PrRh${}_2$Zn${}_{20}$
• Hidden order and beyond: an experimental-theoretical overview of the multifaceted behavior of URu${}_2$Si${}_2$
• Unveiling Hidden Orders: Magnetostriction as a Probe of Multipolar-Ordered States
• Complex Landau Ginzburg Theory of the Hidden Order in URu_2Si_2
• Landau theory of multipolar orders in Pr(TM)${}_2$X${}_{20}$ Kondo materials
• Two-stage multipolar ordering in Pr(TM)${}_2$Al${}_{20}$ Kondo materials
• Cubic hastatic order in the two-channel Kondo-Heisenberg model
• Field-induced Ferrohastatic Order in Cubic Non-Kramers Doublet Systems
• Competing Kondo Effects in Non-Kramers Doublet Systems
• Quadrupolar Susceptibility and Magnetic Phase Diagram of PrNi${}_2$Cd${}_{20}$ with Non-Kramers Doublet Ground State
• Ising Quasiparticles and Hidden Order in URu${}_2$Si${}_2$

Cited by in corpus (3)

• Vanishing RKKY interactions in Ce-based cage compounds
• Fate of multipolar physics in $5d^2$ double perovskites
• Non-Fermi-liquid behavior in a ferromagnetic heavy fermion system CeTi${}_{1-x}$V${}_x$Ge${}_3$