Multiple ordered phases in the filled skutterudite compound PrOs${}_4$As${}_{12}$

Abstract

Magnetization, specific heat, and electrical resistivity measurements were made on single crystals of the filled skutterudite compound PrOs${}_4$As${}_{12}$. Specific heat measurements indicate an electronic specific heat coefficient $\gamma$ $\sim 50-200$ mJ/mol K${}^2$ at temperatures 10 K $\le T\le 18$ K, and $\sim 1$ J/mol K${}^2$ for $T\le 1.6$ K. Magnetization, specific heat, and electrical resistivity measurements reveal the presence of two, or possibly three, ordered phases at temperatures below $\sim 2.3$ K and in fields below $\sim 3$ T. The low temperature phase displays antiferromagnetic characteristics, while the nature of the ordering in the other phase(s) has yet to be determined.

6 pages with 7 figures, accepted for publication by PRB

References in corpus (6)

• Time-Reversal Symmetry-Breaking Superconductivity in Heavy Fermion PrOs4Sb12 detected by Muon Spin Relaxation
• Multiple Superconducting Phases in New Heavy Fermion Superconductor PrOs4Sb12
• Anomalous heavy-fermion and ordered states in the filled skutterudite PrFe4P12
• Exotic Heavy Fermion State in the Filled Skutterudite PrFe${}_4$P${}_{12}$ Uncovered by the de Haas-van Alphen Effect
• Probing the superconducting gap symmetry of PrOs${}_4$Sb${}_{12}$: A penetration depth study
• Pronounced enhancement of the lower critical field and critical current deep in the superconducting state of PrOs${}_4$Sb${}_{12}$

Cited by in corpus (6)

• A de Haas-van Alphen study of the filled skutterudite compounds PrOs${}_4$As${}_{12}$ and LaOs${}_4$As${}_{12}$
• Investigation of superconducting and normal-state properties of the filled-skutterudite system PrPt${}_4$Ge${}_{12-x}$Sb${}_x$
• Dynamical splitting of cubic crystal field levels in rare-earth cage compounds
• Fermi-surface topologies and low-temperature phases of the filled Skutterudite compounds CeOs${}_4$Sb${}_{12}$ and NdOs${}_4$Sb${}_{12}$
• First Principles Study of Electronic Structure and Fermi Surface in Rare-earth Filled Skutterudites RPt4Ge12
• Inelastic neutron scattering studies of Crystal Field Levels in PrOs${}_4$As${}_{12}$