Field-dependent ordered phases and Kondo phenomena in the filled skutterudite compound PrOs4As12 | Zendy

M. B. Maple | Zendy; Nicholas P. Butch | Zendy; N. A. Frederick | Zendy; Pei-Chun Ho | Zendy; Jason R. Jeffries | Zendy; T. A. Sayles | Zendy; Tatsuya Yanagisawa | Zendy; W. M. Yuhasz | Zendy; Songxue Chi | Zendy; H. J. Kang | Zendy; J. W. Lynn | Zendy; Pengcheng Dai | Zendy; S. McCall | Zendy; M. McElfresh | Zendy; M. J. Fluss | Zendy; Z. Henkie | Zendy; A. Pietraszko | Zendy

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Field-dependent ordered phases and Kondo phenomena in the filled skutterudite compound PrOs₄As₁₂

Author(s) -

M. B. Maple,

Nicholas P. Butch,

N. A. Frederick,

Pei-Chun Ho,

Jason R. Jeffries,

T. A. Sayles,

Tatsuya Yanagisawa,

W. M. Yuhasz,

Songxue Chi,

H. J. Kang,

J. W. Lynn,

Pengcheng Dai,

S. McCall,

M. McElfresh,

M. J. Fluss,

Z. Henkie,

A. Pietraszko

Publication year - 2006

Publication title -

proceedings of the national academy of sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.011

H-Index - 771

eISSN - 1091-6490

pISSN - 0027-8424

DOI - 10.1073/pnas.0601541103

Subject(s) - skutterudite , condensed matter physics , antiferromagnetism , electrical resistivity and conductivity , paramagnetism , magnetization , magnetic susceptibility , ground state , kondo effect , heat capacity , materials science , magnetic field , chemistry , physics , thermodynamics , thermoelectric materials , atomic physics , quantum mechanics

Electrical resistivity, specific heat, and magnetization measurements to temperatures as low as 80 mK and magnetic fields up to 16 T were made on the filled skutterudite compound PrOs4As12. The measurements reveal the presence of two ordered phases at temperatures below approximately 2.3 K and in fields below approximately 3 T. Neutron-scattering experiments in zero field establish an antiferromagnetic ground state < 2.28 K. In the antiferromagnetically ordered state, the electronic-specific heat coefficient gamma approximately 1 J/mol x K2 below 1.6 K and 0 < or = H < or = 1.25 T. The temperature and magnetic-field dependence of the electrical resistivity and specific heat in the paramagnetic state are consistent with single-ion Kondo behavior with a low Kondo temperature on the order of 1 K. The electronic-specific heat in the paramagnetic state can be described by the resonance-level model with a large zero-temperature electronic-specific heat coefficient that decreases with increasing magnetic field from approximately 1 J/mol x K2 at 3 T to approximately 0.2 J/mol x K2 at 16 T.

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