Electrical Resistivity Measurements on Manganese Oxides with Layer and Tunnel Structures: Birnessites, Todorokites, and Cryptomelanes

Direct-current measurements were used to determine the electrical resistivities of several manganese oxide materials having either layered or tunnel structures. Birnessite (Na-OL-1, OL=octahedral layer) consists of layers of edge- and corner-sharing Mn{sub 6} octahedral units with Na{sup +} in the i...

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Veröffentlicht in:	Chemistry of Materials 1995-07, Vol.7 (7), p.1286-1292
Hauptverfasser:	De Guzman, Roberto N, Awaluddin, Amir, Shen, Yan-Fei, Tian, Zheng Rong, Suib, Steven L, Ching, Stanton, O'Young, Chi-Lin
Format:	Artikel
Sprache:	eng
Schlagworte:	ACTIVATION ENERGY Condensed matter: electronic structure, electrical, magnetic, and optical properties Conductivity phenomena in semiconductors and insulators ELECTRIC CONDUCTIVITY Electronic transport in condensed matter Exact sciences and technology LAYERS Low-field transport and mobility piezoresistance MANGANESE OXIDES MATERIALS SCIENCE Physics TEMPERATURE DEPENDENCE TEMPERATURE RANGE 0065-0273 K TEMPERATURE RANGE 0273-0400 K TUNNELS
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