Preparation and Characterization of Conducting Transition Metal Oxides

摘要

The preparative methods and discussion of the structure and properties of severalconducting transition metal oxides are presented. The importance of preparing homogenous materials with precisely known stoichiometry is emphasized. A comparison is also made of the various techniques used to prepare both polycrystalline and single crystal samples. For transition metal oxides, the metallic properties are discussed either in terms of metal-metal distances which are short enough to result in metallic behavior or in terms of the formation of a Pi band resulting from covalent metal-oxygen interactions. The discussion is limited to the elements Ti, V, Re, Mo, W, Ru, Nb and Cu. The preparative methods and discussion of the structure and properties of several conducting transition metal oxides are presented in this chapter. The importance of preparing homogeneous materials with precisely known stoichiometry is emphasized. A comparison is also made of the various techniques used to prepare both polycrystalline and single crystal samples.