Multiple ordered phases in the filled skutterudite compound PrOs$_{4}$As$_{12}$

Details Multiple ordered phases in the filled skutterudite compound PrOs$_{4}$As$_{12}$ Multiple ordered phases in the filled skutterudite compound PrOs$_{4}$As$_{12}$

2005-12-14

arxiv.org/abs/cond-mat/0512325v2

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages with 7 figures, accepted for publication by PRB

Scientific paper

10.1103/PhysRevB.73.144409

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 $\leq T \leq 18$ K, and $\sim 1$ J/mol K$^{2}$ for $T \leq 1.6$ 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.

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