Cobalt Oxides (eBook)

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.

PREFACE

CRYSTAL CHEMISTRY OF COBALT OXIDES
Introduction
Stoichiometric Perovskites LnCoO3
Stoichiometric Ln1_x AxCoO3 Perovskites (A¼Ca, 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 ¼ 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 PREFACE

CRYSTAL CHEMISTRY OF COBALT OXIDES
Introduction
Stoichiometric Perovskites LnCoO3
Stoichiometric Ln1_x AxCoO3 Perovskites (A¼Ca, 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 ¼ 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 LnBaCo2O5pd 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