Current density and intrinsic electroresistance of the Sm_{1?e='font-style: italic'>x}Sr_xMnO₃ manganite

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• 作者：S.T. Mahmud ; M.M. Saber ; H.S. Alagoz ; J. Jung ; K.H. Chow
• 关键词：A. Manganite ; D. Current density ; D. Electroresistance ; D. Phase separation
• 刊名：Journal of Physics and Chemistry of Solids
• 出版年：2013
• 出版时间：December, 2013
• 年：2013
• 卷：74
• 期：12
• 页码：1865-1867
• 全文大小：386 K

文摘

We experimentally investigate the role of geometry on the current and current density dependencies of the intrinsic electroresistance of Sm_1?<em>xem>Sr_<em>xem>MnO₃ of two compositions (<em>xem>=0.40 and <em>xem>=0.45). It is found that for each composition, the plot of the intrinsic electroresistance versus current density for samples with different dimensions and resistances coincide whereas this does not happen in the case of the electroresistance versus the magnitude of the current. These results confirm that the current density is indeed the relevant ¡°universal¡± parameter for controlling the intrinsic electroresistance of these manganites.