On peculiarities of the electron transport in doped manganites

17th Russian Youth Conference on Physics of Semiconductors and Nanostructures, Opto- and Nanoelectronics

Fetisova, M.V.^1 ; Martynova, O.A.^1 ; Gasumyants, V.E.^1

Peter the Great St. Petersburg Polytechnic University, 29 Polytechnicheskaya str., St. Petersburg

195251, Russia^1

关键词: Conduction process;    Doped manganites;    Doped sample;    Electron transport;    Electron-doped manganites;    High doping level;    Temperature dependence;    Temperature range;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/690/1/012007/pdf
DOI  :  10.1088/1742-6596/690/1/012007

来源: IOP

【 摘 要 】

A systematic experimental study of the temperature dependences of the resistivity and thermopower, S, in hole- and electron-doped manganites of the ReMnO3(Re = La, Ce) systems doped by strontium in a wide range of content was performed. The main specific features of the thermopower behavior at temperatures both below and above the temperature of the magneto-ordered transition were revealed and discussed. The S(T) dependences were observed to be quite complicated in both temperature ranges. The S(T = 300 K) values are negative for the Ce1-xSrxMnO3samples, while for the La1-xSrxMnO3ones they are positive for slightly doped samples (at x0.333). The thermopower results are qualitatively discussed with respect to peculiarities of the conduction process.