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Author : Bradley Kirk Roberts
Release : 2009
Genre : Zinc oxide thin films
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Defect-mediated Magnetism of Transition Metal Doped ZnO Thin Films by : Bradley Kirk Roberts
Download or read book Defect-mediated Magnetism of Transition Metal Doped ZnO Thin Films written by Bradley Kirk Roberts. This book was released on 2009. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sudipta Bandyopadhyay
Release : 2014-11-19
Genre :
Kind : eBook
Book Rating : 565/5 ( reviews)
Book Synopsis Physical Properties of Dilute Magnetic Semiconducting Oxides by : Sudipta Bandyopadhyay
Download or read book Physical Properties of Dilute Magnetic Semiconducting Oxides written by Sudipta Bandyopadhyay. This book was released on 2014-11-19. Available in PDF, EPUB and Kindle. Book excerpt: Transition metal doped ZnO has been studied from the perspective of its suitability in electronic applications. Bulk samples of Mn doped ZnO has been synthesized by solid state reaction and sol-gel techniques. Thin films of Mn doped ZnO has been synthesized by only sol-gel spin coating technique. So far as Co doped ZnO is concerned it is basically Co co-doped AZO [Al doped ZnO] film synthesized by sol-gel dip coating technique. Above 3 at% of Mn doping impurity phase has been developed for bulk powder sample. The impurity phase was completely or partially dissolved by ion beam irradiation. The role of Zn vacancy and substitutional replacement of Mn at Zn site is crucial for intrinsic ferromagnetism. Further counterbalancing antiferromagnetism and paramagnetism are also present. 2 at% Mn doped ZnO powder sample indicate metal insulator transition. Mn doped ZnO films exhibit defect induced ferromagnetism and interpreted in terms of bound magnetic polaron. Zn Vacancy favours and oxygen vacancy opposes intrinsic ferromagnetism in Mn doped ZnO film. Highly conducting Co co-doped AZO films shows potential for applications with interesting low temperature resistivity behaviour.
Author : Sunil Thapa
Release : 2016
Genre : Ferromagnetism
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis DEFECTS AND FERROMAGNETISM IN TRANSITION METAL DOPED ZINC OXIDE by : Sunil Thapa
Download or read book DEFECTS AND FERROMAGNETISM IN TRANSITION METAL DOPED ZINC OXIDE written by Sunil Thapa. This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt: Transition metal doped zinc oxide has been studied recently due to its potential application in spintronic devices. The magnetic semiconductor, often called Diluted Magnetic Semiconductors (DMS), has the ability to incorporate both charge and spin into a single formalism. Despite a large number of studies on ferromagnetism in ZnO based DMS and the realization of its room temperature ferromagnetism, there is still a debate about the origin of the ferromagnetism. In this work, the synthesis and characterization of transition metal doped zinc oxide have been carried out. The sol-gel method was used to synthesize thin films, and they were subsequently annealed in air. Characterization of doped zinc oxide films was carried out using the UV-visible range spectrometer, scanning electron microscopy, superconducting quantum interference device (SQUID), x-ray diffraction(XRD) and positron annihilation spectroscopy. Hysteresis loops were obtained for copper and manganese doped zinc oxide, but a reversed hysteresis loop was observed for 2% Al 3% Co doped zinc oxide. The reversed hysteresis loop has been explained using a two-layer model.
Author : Parmod Kumar
Release : 2023-05-26
Genre : Technology & Engineering
Kind : eBook
Book Rating : 086/5 ( reviews)
Book Synopsis Defect-Induced Magnetism in Oxide Semiconductors by : Parmod Kumar
Download or read book Defect-Induced Magnetism in Oxide Semiconductors written by Parmod Kumar. This book was released on 2023-05-26. Available in PDF, EPUB and Kindle. Book excerpt: Defect-Induced Magnetism in Oxide Semiconductors provides an overview of the latest advances in defect engineering to create new magnetic materials and enable new technological applications. First, the book introduces the mechanisms, behavior, and theory of magnetism in oxide semiconductors and reviews the methods of inducing magnetism in these materials. Then, strategies such as pulsed laser deposition and RF sputtering to grow oxide nanostructured materials with induced magnetism are discussed. This is followed by a review of the most relevant postdeposition methods to induce magnetism in oxide semiconductors including annealing, ion irradiation, and ion implantation. Examples of defect-induced magnetism in oxide semiconductors are provided along with selected applications. This book is a suitable reference for academic researchers and practitioners and for people engaged in research and development in the disciplines of materials science and engineering. - Reviews the magnetic, electrical, dielectric and optical properties of oxide semiconductors with defect-induced magnetism - Discusses growth and post-deposition strategies to grow oxide nanostructured materials such as oxide thin films with defect-induced magnetism - Provides examples of materials with defect-induced magnetism such as zinc oxide, cerium dioxide, hafnium dioxide, and more
Author : Parmod Kumar
Release : 2022-02-23
Genre : Science
Kind : eBook
Book Rating : 62X/5 ( reviews)
Book Synopsis Ion Beam Induced Defects and Their Effects in Oxide Materials by : Parmod Kumar
Download or read book Ion Beam Induced Defects and Their Effects in Oxide Materials written by Parmod Kumar. This book was released on 2022-02-23. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overview of the applications of ion beam techniques in oxide materials. Oxide materials exhibit defect-induced physical properties relevant to applications in sensing, optoelectronics and spintronics. Defects in these oxide materials also lead to magnetism in non-magnetic materials or to a change of magnetic ordering in magnetic materials. Thus, an understanding of defects is of immense importance. To date, ion beam tools are considered the most effective techniques for producing controlled defects in these oxides. This book will detail the ion beam tools utilized for creating defects in oxides.
