Magnetic Properties Of Tmi Doped Nano Zinc Ferrites

Hydrothermally synthesized rare-earth oxide compounds such as Nd2O3, Dy2O3, Gd2O3, Eu2O3, Y2O3, etc. and hydroxide compounds such as Y(OH)3, Dy(OH)3, Gd(OH)3, Eu(OH)3, Tb(OH)3, etc. have been widely used as high-performance luminescent devices, catalysts and other functional materials based on the electronic, optical and chemical characteristics arising from their 4f electrons. In the crystallization process, surfactant molecules adsorbed on the crystal nuclei serve not only as a growth director but also as a protector to prevent from aggregation of the product. As a result, nanorods were produced. Cetyl trimethyl ammonium bromide (CTAB) and hexadecylamine (HDA) surfactant are plays a key role in controlling the growth and production of oxide phosphors in the hydrothermal method.

Nanosized magnetic materials have received great attention and importance during the last decade. Nanomagnetic material is one of the hottest subjects of present day research activities. The physical properties of nanosized magnetic materials differ considerably from that of their bulk counterparts and the magnetic characteristics of many materials can be tuned by reducing their size. The objectives of this research work are the synthesis and studies on the structural and magnetic properties of some selected transition metal oxides and ferrites in nanocrystalline form. The research work has been carried out on transition metal ion doped zinc oxide (ZnO) based diluted magnetic semiconductors (DMSs), some ferrites (for instance, Zn-ferrite, NiZn-ferrite, maghemite, etc.) and magnetopolymer nanocomposite systems. The respective nanocrystalline oxides are synthesized using a simple solution combustion method and characterized using various techniques. The results from the studies on different materials are presented in this thesis, consisting of six chapters. Last but not the least, several performance parameters have been measured and conditions for best results have been discussed.

The book focuses on the relevant basic concepts of Magnetic oxides, as well as on synthesis routes and important applications of spinel ferrites, hexaferrites and magnetic oxide nanomaterials. Keywords: Magnetic Oxides, Spinel Ferrites, Hexaferrites, Magnetoelectric Ceramic Composites, Soft Ferrites, Nano-Size Spinel Ferrites, Magnetic Nanoparticles, Device Miniaturization.

As a fast-emerging and growing class of magnetic materials, ferrites have generated an increasing amount of interest for providing specific magnetic properties through controlled mixture in composites. The study of magnetic ferrite nanocomposites requires a multidisciplinary approach, involving novel synthesis techniques and an understanding of solid-state physics, electronic engineering, and material science. Magnetic Ferrites and Related Nanocomposites covers recent trends of various types of ferrite nanocomposites and evaluating the mechanisms for interpreting static and dynamic magnetic properties. Sections cover the fundamentals of magnetism, introducing different kinds of ferrites, ferrite characterization techniques, magneto-electric ferrite nanocomposites, exchange spring ferrite nanocomposites, shielding effectiveness and microwave absorption characteristics of ferrite-carbon materials, photocatalytic application of ferrite nanocomposites, and novel synthesis techniques for fabricating ferrite in nanoparticles, bulks, thin films, and nanofiber configurations. This book is an important reference for scientists, researchers, graduate students, and practitioners active in this field in order to broaden their understanding of ferrite nanocomposites and their impact on modern technology. Provides background information regarding various basic magnetic phenomena and related theories, and defines the different natures of magnetic materials Covers a wide range of hard and soft ferrites and related nanocomposites, particularly focusing on the correlation between structural features and magnetic analysis Explores the role of substituted cations on the structural, thermal, magnetic, and microwave characteristics of ferrites and their nanocomposites Discusses the mechanism involved for magnetic properties of major types of ferrite-ferroelectric magneto-electric components, exchange spring ferrite nanocomposites for fabricating next-generation permanent magnets, ferrite carbon nanocomposites for suppressing high-frequency electromagnetic radiation, and ferrite photocatalysts for omitting pollutants from our environment Assesses the major challenges of experimental characterization and novel manufacturing techniques for fabrication of high quality ferrite, in terms of purity, shape, size, and distribution, and the application on an industrial scale

Ferrite nanoparticles have attracted a lot of promise in different field (Targeted drug delivery, NMR, hyperthermia and etc).In this book, we dealt with synthetic tehnique (Chemical precipitation and Microemulsion) for the synthesis of multicomponent ferrite nanoparticles. We carried out structural and magnetic study of multicomponent ferrite at different temperature. We also studied the effect of Zn doping in different ratio on structural and magnetic properties.We also studied magnetic behavior at different temperature. This book also dealt with synthesis of long nanofibre polyaniline and its composite with multicomponent ferrite. we discussed the effect of polyaniline nanofibre on magnetic properties of ferrite and mechanism of formation of polyaniline nanofibre and polyaniline composite with schematic diagram. So this book will be very helpful for those who are doing work in the field of nanoparticle and its composite