Transport and Magnetic Studies of New Mixed-Valence Compounds: K_{3}Cu_{8}Se_{6}, KCu_{3}Se_{2}, K_{3}Cu_{8}Te_{6} and BaCuS_{3-x}

• Authors: I. Jacyna-Onyszkiewicz , M. Sidowski , W. Starodub , A. Ratuszna , S. Robaszkiewicz
• Languages of publication: EN

Abstracts

EN

New mixed-valent copper chalcogenides BaCuS_{3-x} and K_{3}Cu_{8}X_{6} with X=Se or Te and KCu_{3}Se_{2}, with chemical patterns corresponding to the recently investigated K_{3}Cu_{8}S_{6} and KCu_{3}S_{2}, were synthesized. For these new samples the results of resistivity and magnetic susceptibility measurements are presented. For BaCuS_{3-x}, K_{3}Cu_{8}Se_{6} and KCu_{3}Se_{2} the metal-insulator transition is observed with the low temperature phase being metallic, which is untypical, whereas K_{3}Cu_{8}Te_{6} is a metal in the investigated temperature range. The temperature dependence of magnetic susceptibility of the studied samples testifies to their diamagnetic or weakly paramagnetic behaviour.

Keywords

EN

75.20.-g; 71.30.+h

• Journal: Acta Physica Polonica A
• Year: 1997
• Volume: 91
• Issue: 2
• Pages: 405-408

Dates

published

1997-02

Contributors

author

I. Jacyna-Onyszkiewicz

• Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

M. Sidowski

• Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

W. Starodub

• Department of Physics, Kharkov State University, Kharkov, Ukraine

author

A. Ratuszna

• Institute of Physics, Silesian University, Uniwersytecka 4, 40-007 Katowice, Poland

author

S. Robaszkiewicz

• Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland