Effect of Ti doping on the electrical transport and magnetic properties of layered compound Na0.8CoO2 |
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| Authors: | W.Y. Zhang Z.P. Guo L. Cui X.P. Zhang Y.G. Shi T.Y. Zhao |
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| Affiliation: | a Department of Physics, Tsinghua University, Beijing 100084, China
b Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | Effect of Ti doping on the electrical transport and magnetic properties of layered Na0.8Co1−xTixO2 compounds has been investigated. The lattice parameters a and c increase with x. A minor amount of Ti doping results in a metal-insulator transition at low temperatures. For samples with x>0.03, the variable-range hopping process dominates the transport behavior above a certain temperature. The temperature dependence of magnetization of all the samples is found to obey the Curie-Weiss law. The mechanism of the doping effect is discussed. |
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| Keywords: | 72.80.Ga 71.27.+a 74.62.Dh |
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