Effects of lithium oxide on the electrical properties of CuO at low temperatures
- 1 August 1990
- journal article
- Published by Springer Science and Business Media LLC in Journal of Materials Research
- Vol. 5 (8), 1739-1744
- https://doi.org/10.1557/jmr.1990.1739
Abstract
We present an investigation of the influence of four dopant lithium concentrations on the electrical properties of CuO. X-ray measurements have revealed a single phase formed up to 4.2 at. % of Li, and a second phase formed, Li2CuO2, in the case of 10.5 at. % of Li concentration. The log(ρ/T) vs 1/Tdata are better represented by two straight lines than by one and show an initial strong decrease of the conduction activation energies for small contents of Li (<1.7 at. %), which becomes weak for larger contents. The change in slope observed in the resistivity measurements as a function of temperature has also been investigated by calorimetric measurements, revealing a specific heat anomaly which can be associated with the antiferromagnetic order transition.Keywords
This publication has 18 references indexed in Scilit:
- On the 3d-configuration of copper in high-Tc superconductorsPhysica C: Superconductivity and its Applications, 1988
- Electric magnetic and thermodynamic anomalies observed in sintered copper oxidePhysica C: Superconductivity and its Applications, 1988
- Bulk superconductivity at 120 K in the Tl–Ca/Ba–Cu–O systemNature, 1988
- Evidence of 3d9-ligand hole states in the superconductor La1.85Sr0.15CuO4 from L3 X-ray absorption spectroscopyPhysics Letters A, 1988
- A New High-Tc Oxide Superconductor without a Rare Earth ElementJapanese Journal of Applied Physics, 1988
- The Cu valence in the highT c superconductors and in monovalent, divalent and trivalent copper oxides determined from XPS core level spectroscopyZeitschrift für Physik B Condensed Matter, 1987
- On the antiferromagnetism of CuO at 230K and its relevance for high Tc superconductivitySolid State Communications, 1987
- Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressurePhysical Review Letters, 1987
- Possible highT c superconductivity in the Ba?La?Cu?O systemZeitschrift für Physik B Condensed Matter, 1986
- Mechanism of the Electrical Conduction in Li-Doped NiOPhysical Review B, 1966