[Zurück]

E. Bauer, St Berger, C. Paul, M. Della Mea, G. Hilscher, H. Michor, M. Reissner, W. Steiner, A. Grytsiv, P. Rogl, E. Scheidt:
"Crystal field effects and thermoelectric properties of PrFe₄Sb₁₂ skutterudite";
Physical Review B, 66 (2002), S. 214421-1 - 214421-9.

Crystal field effects and thermoelectric properties of PrFe4Sb12 skutterudite

E. Bauer, St. Berger, Ch. Paul, M. Della Mea, G. Hilscher, H. Michor, M. Reissner, and W. Steiner Institut für Festkörperphysik, Technische Universität Wien, A-1040 Wien, Austria

A. Grytsiv and P. Rogl Institut für Physikalische Chemie, Universität Wien, A-1090 Wien, Austria

E. W. Scheidt Lehrstuhl für Experimentalphysik III, Universität Augsburg, D-86159 Augsburg, Germany

(Received 5 August 2002; published 31 December 2002)

Transport and magnetic properties are reported for ternary skutterudites La0.83Fe4Sb12 and Pr0.73Fe4Sb12. Physical properties of Pr0.73Fe4Sb12 are dominated by crystal electric field effects, yielding in the magnetic triplet [Gamma] 5 as ground state. As a result, long-range magnetic order appears below 4.6 K. Pr0.73Fe4Sb12 exhibits an unusually high electronic contribution to the specific heat Cp/T of several hundred mJ/mol K2, and a significant value of a nuclear Schottky contribution is derived below about 1 K, primarily related to 141Pr with a nuclear spin I = 5/2. The figure of merit at room temperature, expressing the thermoelectric performance of Pr0.73Fe4Sb12, is about 0.075. ©2002 The American Physical Society

http://link.aps.org/abstract/PRB/v66/e214421