Publications in Scientific Journals:

A.P. Pikul, D. Kaczorowski, T. Plackowski, A. Czopnik, H. Michor, E. Bauer, G. Hilscher, P. Rogl, YU. Grin:
"Kondo behavior in antiferromagnetic CeNiGe3";
Physical Review B, 67 (2003), 224417-1 - 224417-10.

English abstract:
Kondo behavior in antiferromagnetic CeNiGe3

A. P. Pikul, D. Kaczorowski, T. Plackowski, and A. Czopnik Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okólna 2, 50-422 Wroc [l] aw, Poland

H. Michor, E. Bauer, and G. Hilscher Institut für Festkörperphysik, Technische Universität Wien, Wiedner Hauptstraße 8-10, A-1040 Wien, Austria

P. Rogl Institut für Physikalische Chemie, Universität Wien, Währinger Straße 42, A-1090 Wien, Austria

Yu. Grin Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, D-01187 Dresden, Germany

(Received 31 January 2003; published 16 June 2003)

CeNiGe3, crystallizing in the orthorhombic SmNiGe3-type crystal structure, was studied by means of dc and ac magnetic susceptibility, magnetization, electrical resistivity, magnetoresistivity, Hall effect, and specific-heat measurements. The compound orders antiferromagnetically at TN = 5.5 K due to the presence of well localized 4f magnetic moments, which are partly screened via a Kondo-like mechanism. The electrical behavior is governed by an interplay of Ruderman-Kittel-Kasuya-Yosida and Kondo interactions modified by crystal-field effects. The Kondo temperature is of similar magnitude as TN, and the overall crystal electric field splitting is of the order of 160 K. The low-temperature specific heat exhibits some enhancement indicating the formation of moderate-heavy quasiparticles in the antiferromagnetic state. The specific variation with applied magnetic field of the main physical characteristics of CeNiGe3 points at a complex magnetic structure of the compound in the ordered region. 2003 The American Physical Society

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