caa a22 4500 463229134 CHVBK 20180405153236.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10853-006-1141-1 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1141-1 Preparation and electrical properties of sintered oxides composed of Mn1.5Co(0.25+ X )Ni(1.25- X )O4 ( $$0 \leqq X \leqq 0.75$$ ) with a cubic spinel structure [Elektronische Daten] [T. Yokoyama, T. Meguro, Y. Shimada, J. Tatami, K. Komeya, Y. Abe] Monophase cubic spinel-type oxides of Mn1.5Co(0.25+X)Ni(1.25-X)O4 ( $$0 \leqq X \leqq 1$$ ) were prepared through the oxidation of specimens sintered at 1400°C. The oxides with $$ 0 \leqq X \leqq 0.75 $$ composition are focused on in this study, as the oxides with $$ 0.75 < X \leqq 1 $$ composition did not convert into a monophase cubic spinel structure. The electrical conductivity of the sintered bodies was confirmed to increase exponentially with increasing temperature. In the composition range of $$0 \leqq X \leqq 0.75$$ , both the electrical conductivity and the Seebeck coefficient increased with increasing X. The oxides with composition between $$0 \leqq X < 0.57$$ were n-type semiconductors, whereas those with $$ 0.57 < X \leqq 0.75 $$ were p-type. It was concluded that electrical conduction in the specimens is controlled by small polaron hopping. Springer Science+Business Media, LLC, 2007 Yokoyama T. Yokohama National University, 79-5 Tokiwadai, 240-8501, Hodogaya-ku, Yokohama-shi, Japan aut Meguro T. Yokohama National University, 79-5 Tokiwadai, 240-8501, Hodogaya-ku, Yokohama-shi, Japan aut Shimada Y. Yokohama National University, 79-5 Tokiwadai, 240-8501, Hodogaya-ku, Yokohama-shi, Japan aut Tatami J. Yokohama National University, 79-5 Tokiwadai, 240-8501, Hodogaya-ku, Yokohama-shi, Japan aut Komeya K. Yokohama National University, 79-5 Tokiwadai, 240-8501, Hodogaya-ku, Yokohama-shi, Japan aut Abe Y. Technol Seven Co. Ltd., 25-6 Tobehonmachi, 226-0041, Nishi-ku, Yokohama-shi, Japan aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/14(2007-07-01), 5860-5866 0022-2461 42:14<5860 2007 42 10853 https://doi.org/10.1007/s10853-006-1141-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1141-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yokoyama T. Yokohama National University, 79-5 Tokiwadai, 240-8501, Hodogaya-ku, Yokohama-shi, Japan aut NATIONALLICENCE 700 1- Meguro T. Yokohama National University, 79-5 Tokiwadai, 240-8501, Hodogaya-ku, Yokohama-shi, Japan aut NATIONALLICENCE 700 1- Shimada Y. Yokohama National University, 79-5 Tokiwadai, 240-8501, Hodogaya-ku, Yokohama-shi, Japan aut NATIONALLICENCE 700 1- Tatami J. Yokohama National University, 79-5 Tokiwadai, 240-8501, Hodogaya-ku, Yokohama-shi, Japan aut NATIONALLICENCE 700 1- Komeya K. Yokohama National University, 79-5 Tokiwadai, 240-8501, Hodogaya-ku, Yokohama-shi, Japan aut NATIONALLICENCE 700 1- Abe Y. Technol Seven Co. Ltd., 25-6 Tobehonmachi, 226-0041, Nishi-ku, Yokohama-shi, Japan aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/14(2007-07-01), 5860-5866 0022-2461 42:14<5860 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer