Transport and Magnetic Studies of New Mixed-Valence Compounds: K3Cu8Se6, KCu3Se2, K3Cu8Te6 and BaCuS3-x |
| I. Jacyna-Onyszkiewicza, M. Sidowskia, W. Starodubb, A. Ratusznac and S. Robaszkiewicza aInstitute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland bDepartment of Physics, Kharkov State University, Kharkov, Ukraine cInstitute of Physics, Silesian University, Uniwersytecka 4, 40-007 Katowice, Poland |
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| New mixed-valent copper chalcogenides BaCuS3-x and K3Cu8X6 with X=Se or Te and KCu3Se2, with chemical patterns corresponding to the recently investigated K3Cu8S6 and KCu3S2, were synthesized. For these new samples the results of resistivity and magnetic susceptibility measurements are presented. For BaCuS3-x, K3Cu8Se6 and KCu3Se2 the metal-insulator transition is observed with the low temperature phase being metallic, which is untypical, whereas K3Cu8Te6 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. |
| DOI: 10.12693/APhysPolA.91.405 PACS numbers: 71.30.+h, 75.20.-g |