Böcker av R. Saravanan

The magnetoelectric properties of multiferroic materials have a high potential for applications in the fields of data storage, spin valves, spintronics, memories, sensors and microelectronic devices. The book presents both a detailed literature review of the field, and the experimental results obtained from various characterization and analytical techniques performed on four series of lanthanum orthoferrite type multiferroics. These materials have been used in solid oxide fuel cells (SOFC), magneto-hydrodynamic power generation (MHD), capacitors and energy storage devices in microelectronics, non-volatile magnetic memory devices and ferroelectric random access memories (Fe-RAM).Keywords: Multiferroics, Lanthanum Orthoferrites, Ferromagnetism, Ferroelectricity, Electrical Conductivity, Thermal Stability, Dielectric Constant, Solid Oxide Fuel Cell (SOFC), Magneto-Hydrodynamic Power Generation (MHD), Capacitors, Energy Storage Devices, Magnetic Memory Devices, Ferroelectric Random Access Memories (Fe-RAM), Charge Density Measurements.

The book presents new research on the synthesis and characterization of various oxide based dilute magnetic spintronics materials (ODMS). The characterization techniques included powder X-ray diffraction, scanning electron microscopy, vibrating sample magnetometry and UV visible spectrometry. The morphological, magnetic and optical properties are reported. Electron density distribution studies are presented in the form of three, two and one dimensional electron density maps.Keywords: Spintronics Materials, Zn1-xTixO, Zn1-xFexO, Zn1-xVxO, Zn1-xNix/2Vx/2O, Synthesis, X-ray Diffraction. Rietveld Analysis, Surface Morphological Properties, Optical Properties, Magnetic Properties, Charge Density Analysis, Electron Density Distribution.

Magneto-electric ceramic composites are important materials for designing new microwave sensors (e.g. field probes) and devices such as filters, attenuators, capacitive resonators, gyrators and devices for medical applications. The book presents new research results for the following composite systems: (1-x) BaTiO3 + x NiFe2O4 II (1-x); BaTiO3 + x ZnFe2O4; (1-x) BaTiO3 + x CoFe2O4 and (1-x) BaTiO3 + x MgFe2O4.Keywords: Magneto-Electric Composites, Powder X-ray diffraction (PXRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS), UV-Visible Spectrophotometry (UV-Vis), Electrical (Dielectric and P-E) Characterization, Magnetic Characterization (M-H), Structural Parameters, Morphological Studies, Elementary Analysis, Optical Studies, Electrical Studies, Magnetic Studies, Charge Density Analysis.

Agricultural extension is in a great transition worldwide. The demand for public extension reform is greater than ever before. The agriculture knowledge infrastructure is evolving in a big way with the emergence of pluralistic extension actors and innovations to cater the needs of the farmeThis book is an attempt to document the past experiences and recent developments in the agriculture knowledge information systems. The compilation of 14 country s such as; Afghanistan, Benin, Cote d'Ivoire, Ghana, India, Iran, Mozambique, Nepal, Peru, Philippines, Trinidad and Tobago and Zimbabwe is intended to document the experience of extension systems. The fourteen country s highlight the worldwide agricultural extension reform measures (Decentralization, Privatization, Demand driven and Cost-recovery approaches), Institutional Pluralism (Public, Private, and NGOs) and Innovations (Farmer to Farmer extension, Participatory and Self-Help Group (SHG) approaches and ICT initiatives). The agricultural extension students, academicians, scientist, practitioners, administrators, and policy makers will find this compilation of extension experiences from the fourteen countries relevant for designing future reforms, advancing pluralistic extension system and also to integrating innovations in their extension approaches.