Electrical resistivity and AC-calorimetric measurements of PrRu4P12 under pressure

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Abstract

We have studied the effect of pressure in the filled skutterudite PrRu4P12, which shows a metal-insulator (MI) transition at TMI = 63 K, via simultaneous measurements of electrical resistivity (ρ) and AC-calorimetry (CAC). Schottky-like anomalies in CAC disappear under pressure, suggesting a change of the ground state. The resistivity below TMI is strongly suppressed with increasing pressure, in contrast to the weak pressure dependence of TMI. Above 10 GPa, ρ (T) shows metallic behavior with small anomalies at TMI. We discuss the likely change of ground state in PrRu4P12 with pressure from triplet to singlet. © 2007 Elsevier B.V. All rights reserved.

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Miyake, A., Holmes, A. T., Kagayama, T., Shimizu, K., Sekine, C., Shirotani, I., … Sato, H. (2008). Electrical resistivity and AC-calorimetric measurements of PrRu4P12 under pressure. Physica B: Condensed Matter, 403(5–9), 1298–1300. https://doi.org/10.1016/j.physb.2007.10.130

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