Cobalt Oxides: From Crystal Chemistry to Physics

Unparalleled in the breadth and depth of its coverage of all important aspects, this book systematically treats the electronic and magnetic properties of stoichiometric and non–stoichiometric cobaltites in both ordered and disordered phases. Authored by a pioneer and a rising star in the field, the monograph summarizes, organizes and streamlines the otherwise difficult–to–obtain information on this topic. An introductory chapter sets forth the crystal chemistry of cobalt oxides to lay the groundwork for an understanding of the complex phenomena observed in this materials class. Special emphasis is placed on a comprehensive discussion of cobaltite physical properties in different structural families. Providing a thorough introduction to cobalt oxides from a chemical and physical viewpoint as a basis for understanding their intricacies, this is a must–have for both experienced researchers as well as entrants to the field.

PREFACE CRYSTAL CHEMISTRY OF COBALT OXIDES Introduction Stoichiometric Perovskites LnCoO3 Stoichiometric Ln1—x AxCoO3 Perovskites (A?Ca, Sr,Ba) Oxygen–Deficient Perovskites: Order–Disorder Phenomena in the Distribution of Anionic Vacancies The Ordered Double Stoichiometric Perovskite LaBaCo2O6 Hexagonal Perovskite and Derivatives The RP–Type Cobaltites: Intergrowths of Perovskite and Rock Salt Layers and Derivatives Cobaltites with a Triangular Lattice Some Other Original Cobaltites ELECTRONIC AND MAGNETIC PROPERTIES OF STOICHIOMETRIC PEROVSKITE COBALTITES Stoichiometric LnCoO3 Perovskites Stoichiometric SrCoO3: Ferromagnetism and Metallic Conductivity Stoichiometric Ln1—xAxCoO3 Perovskites (A ? Ca, Sr, and Ba) The < Ordered > Double Stoichiometric Perovskite LaBaCo2O6 ELECTRONIC AND MAGNETIC PROPERTIES OF OXYGEN–DEFICIENT PEROVSKITE COBALTITES SR1—XLNXCOO3—D AND SRCO1—XMXO3—D Disordered Perovskites Ordered 112 LnBaCo2O5+d Perovskites ELECTRONIC AND MAGNETIC PROPERTIES OF RUDDLESDEN–POEPPER–TYPE COBALTITES Cobalt Valence and Spin State Transitions Magnetic Properties of RP Phases Electrical Properties of RP Phases Phase Separation in RP Phases Magnetoresistance of RP Phases Thermoelectric Properties of RP Phases ELECTRONIC AND MAGNETIC PROPERTIES OF COBALTITES WITH A 3D "TRIANGULAR LATTICE" The Co3O4 Spinel and Derivatives The "114" LnBaCo4O7 and CaBaCo4O7 Cobaltites ELECTRONIC AND MAGNETIC PROPERTIES OF "TRIANGULAR" LAYERED COBALTITES The Layer Sodium Cobaltites NaxCoO2 Misfit Cobaltites ELECTRONIC AND MAGNETIC PROPERTIES OF THE "UNIDIMENSIONAL" COBALTITE CA3CO2O6 Valence and Spin State of Cobalt Magnetic Properties of 1D–Ca3Co2O6 and Related Derivatives Electrical Resistivity of Ca3Co2O6 and Derivatives Magnetoresistance of Ca3Co2O6 Thermoelectric Power of Ca3Co2O6 and Derivatives

Bernard Raveau is Emeritus Professor at the University of Caen, France. He received his formal education at this University, and at Ecole Nationale Supérieure de Chimie de Caen as Engineer, and obtained his PhD degree in Physics in 1966. He was Director of CRISMAT, the Laboratory for Crystallography and Materials Science, in Caen, from 1986 to 2004, where he presently continues carrying out his research. He is the founder of the National Research Centre of Technology for Materials, CNRT Matériaux, in Caen, and has been Director of this Centre from 2000 to 2010. Bernard Raveau is a specialist of crystal chemistry and discovered many new transition metal oxides, including high Tc superconducting cuprates, CMR manganites, thermoelectric cobaltites and transition metal phosphates. Author of more than 1300 journal publications, and three books, he has received numerous awards including Berndt Mathias Prize and European Italgaz Prize. He is a member of the Institut Universitaire de France, of Académie des Sciences, of the Indian Academy and Fellow of the Royal Society. Dr. Md. Motin Seikh is Assistant Professor in the Department of Chemistry at Visva–Bharati University, Santiniketan, West Bengal, India. He has obtained his PhD from the Solid State and Structural Chemistry Unit, Indian Institute of Science (IISc), Bangalore in 2006. He carried out his postdoctoral research at Laboratoire CRISMAT in Caen, France for two years from 2006 to 2007. Dr. Seikh has published very original papers on various aspects of strongly correlated electron oxides, mainly manganites, ferrites and cobaltites. For his outstanding research contribution he received the Best Thesis Award for his PhD in materials chemistry from IISc in the year 2006. He was also a recipient of Junior and Senior Research Fellowship of the Government of India, and a visiting scientist under the programme of the Japanese Society for the Promotion of Science in the year 2004. He has also authored ′Investigations on Transition Metal Oxides′ Lambert Academic Publishing, Germany in 2010.