Heavy fermion behavior in Pr0.5Ir4Sb10.2Sn1.8

Matthew S. Cook; Clement A. Burns

doi:10.1016/j.physb.2020.412428

Heavy fermion behavior in Pr_0.5Ir₄Sb_10.2Sn_1.8

Matthew S. Cook
, Clement A. Burns

Correlated Electron Materials

Research output: Contribution to journal › Article › peer-review

Abstract

We report on the properties of single crystals of Pr_0.5Ir₄Sb_10.2Sn_1.8, a new partially-filled rare earth skutterudite which exhibits Kondo alloy and heavy fermion behavior. Using magnetic susceptibility, specific heat, and resistivity measurements we find evidence of Kondo-screening of the f-moments. This material shows a Kadowaki-Woods ratio consistent with heavy fermion behavior. Susceptibility measurements predict a Kondo temperature T_K≈4K, however the minimum found in the low temperature resistivity appears at a higher temperature T≈10K. A small fraction of the material (<0.5%) becomes superconducting with a critical temperature T_c≈4.2K.

Original language	English
Article number	412428
Journal	Physica B: Condensed Matter
Volume	598
DOIs	https://doi.org/10.1016/j.physb.2020.412428
State	Published - Dec 1 2020

Funding

We would like to thank Dr. Pnina Ari-Gur, Department of Mechanical and Aerospace Engineering, Western Michigan University for use of the PANalytical PXRD facility which was funded by National Science Foundation, United States MRI Award 1626276 . This work was partially funded by Michigan Space Grant Consortium, NASA grant #NNX15AJ20H . The PPMS used for measurements was funded by NSF MRI grant 1828387 .

Keywords

Filled skutterudite
Heavy fermion
Kondo scattering
Superconductivity

Access to Document

10.1016/j.physb.2020.412428

Cite this

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title = "Heavy fermion behavior in Pr0.5Ir4Sb10.2Sn1.8",

abstract = "We report on the properties of single crystals of Pr0.5Ir4Sb10.2Sn1.8, a new partially-filled rare earth skutterudite which exhibits Kondo alloy and heavy fermion behavior. Using magnetic susceptibility, specific heat, and resistivity measurements we find evidence of Kondo-screening of the f-moments. This material shows a Kadowaki-Woods ratio consistent with heavy fermion behavior. Susceptibility measurements predict a Kondo temperature TK≈4K, however the minimum found in the low temperature resistivity appears at a higher temperature T≈10K. A small fraction of the material (<0.5\%) becomes superconducting with a critical temperature Tc≈4.2K.",

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AU - Burns, Clement A.

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N2 - We report on the properties of single crystals of Pr0.5Ir4Sb10.2Sn1.8, a new partially-filled rare earth skutterudite which exhibits Kondo alloy and heavy fermion behavior. Using magnetic susceptibility, specific heat, and resistivity measurements we find evidence of Kondo-screening of the f-moments. This material shows a Kadowaki-Woods ratio consistent with heavy fermion behavior. Susceptibility measurements predict a Kondo temperature TK≈4K, however the minimum found in the low temperature resistivity appears at a higher temperature T≈10K. A small fraction of the material (<0.5%) becomes superconducting with a critical temperature Tc≈4.2K.

AB - We report on the properties of single crystals of Pr0.5Ir4Sb10.2Sn1.8, a new partially-filled rare earth skutterudite which exhibits Kondo alloy and heavy fermion behavior. Using magnetic susceptibility, specific heat, and resistivity measurements we find evidence of Kondo-screening of the f-moments. This material shows a Kadowaki-Woods ratio consistent with heavy fermion behavior. Susceptibility measurements predict a Kondo temperature TK≈4K, however the minimum found in the low temperature resistivity appears at a higher temperature T≈10K. A small fraction of the material (<0.5%) becomes superconducting with a critical temperature Tc≈4.2K.

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