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Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
As technology scales down, many opportunities are available for conventional magnetic storage devices. The advent of nanofabrication technology offers capabilities in patterning materials and modifying the magnetic properties. The focus of this research is to design and fabricate magnetic nanostructures and understand the magnetic behavior modified by nanostructures, to generate new devices for magnetic storage applications. This dissertation has concentrated on the fabrication, simulation and characterization of magnetic nanostructures for new storage applications. First, novel techniques have been successfully developed to fabricate nanostructures with different shapes and dimensions below the resolution limit of photolithography tool. Anisotropic nanostructures, diamonds and triangles, have been obtained by over-exposure technique; nano-rings, both centered and de-centered, have been obtained by lateral etch technique and ALD spacer mask technique. All these techniques are simple and use conventional photolithography. Large area, high density nanostructures have been obtained at low cost. The above techniques have been investigated and optimized for better control of magnetic properties. Second, anisotropic nanostructures have been characterized correlated with simulation to understand the shape anisotropy effect on magnetic behavior. Coercivity change and angular dependent behavior result from pinning the magnet by the nanostructures and these have been explored. Dimensions of nanostructure also play an important role in changing the magnetic properties. At constant density, nanostructures of larger size introduce more anisotropy and result in higher coercivity and remanence. Third, nano-rings have been characterized correlated with simulation to study the magnetic state switching process. Various dimensions of rings have been compared and have revealed that the vortex state in rings is affected by the dimensions of inner diameter, width and thickness. The shape.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
As technology scales down, many opportunities are available for conventional magnetic storage devices. The advent of nanofabrication technology offers capabilities in patterning materials and modifying the magnetic properties. The focus of this research is to design and fabricate magnetic nanostructures and understand the magnetic behavior modified by nanostructures, to generate new devices for magnetic storage applications. This dissertation has concentrated on the fabrication, simulation and characterization of magnetic nanostructures for new storage applications. First, novel techniques have been successfully developed to fabricate nanostructures with different shapes and dimensions below the resolution limit of photolithography tool. Anisotropic nanostructures, diamonds and triangles, have been obtained by over-exposure technique; nano-rings, both centered and de-centered, have been obtained by lateral etch technique and ALD spacer mask technique. All these techniques are simple and use conventional photolithography. Large area, high density nanostructures have been obtained at low cost. The above techniques have been investigated and optimized for better control of magnetic properties. Second, anisotropic nanostructures have been characterized correlated with simulation to understand the shape anisotropy effect on magnetic behavior. Coercivity change and angular dependent behavior result from pinning the magnet by the nanostructures and these have been explored. Dimensions of nanostructure also play an important role in changing the magnetic properties. At constant density, nanostructures of larger size introduce more anisotropy and result in higher coercivity and remanence. Third, nano-rings have been characterized correlated with simulation to study the magnetic state switching process. Various dimensions of rings have been compared and have revealed that the vortex state in rings is affected by the dimensions of inner diameter, width and thickness. The shape.
Author: Natalia Domracheva Publisher: Elsevier ISBN: 0128135956 Category : Technology & Engineering Languages : en Pages : 492
Book Description
Novel Magnetic Nanostructures: Unique Properties and Applications reviews the synthesis, design, characterization and unique properties of emerging nanostructured magnetic materials. It discusses the most promising and relevant applications, including data storage, spintronics and biomedical applications. Properties investigated include electronic, self-assembling, multifunctional, and magnetic properties, along with magnetic phenomena. Structures range from magnetic nanoclusters, nanoparticles, and nanowires, to multilayers and self-assembling nanosystems. This book provides a better understanding of the static and dynamic magnetism in new nanostructures for important applications. - Provides an overview of the latest research on novel magnetic nanostructures, including molecular nanomagnets, metallacrown magnetic nanostructures, magnetic dendrimers, self-assembling magnetic structures, multifunctional nanostructures, and much more - Reviews the synthesis, design, characterization and detection of useful properties in new magnetic nanostructures - Highlights the most relevant applications, including spintronic, data storage and biomedical applications
Author: Farzad Nasirpouri Publisher: World Scientific ISBN: 9814468029 Category : Science Languages : en Pages : 401
Book Description
Spintronics manipulates individual magnetic moments to integrate logic functions and non-volatile information storage on the same platform. As is often the case in condensed matter science, advances are made through the synthesis of novel materials and high quality new physics materials. Giant magnetoresistance and dilute magnetic semiconductors are two such examples. However, the remarkable potential of spintronics for quantum computation faces major challenges when it comes to controlling simultaneously several qbits encoded in magnetic moments.After a brief introduction to concepts in nanomagnetism and spintronics, the text reviews recent techniques and their achievements in the synthesis and fabrication of magnetic nanostructures. The methods presented here emphasize bottom up or top down approaches for nanodots, nanowires and thin films. They include: focused ion beam irradiation, electron beam-induced chemical vapour deposition, chemical, and electrochemical methods. The later part of the book reviews magnetoelectric materials, the giant magnetoresistance in magnetic superlattices, dynamics effects in spin transfer torque oscillators, dilute magnetic oxides, rare earth nitrides with nuclear resonance scattering, and Mössbauer spectroscopy in spintronics. Finally, the last part of this book discusses applications to magnetic storage and bio-magnetism.Nanomagnetism and Spintronics will be useful to graduate students and researchers and engineers in the field of nanoscience.
Author: Yanglong Hou Publisher: John Wiley & Sons ISBN: 3527803246 Category : Science Languages : en Pages : 602
Book Description
Timely and comprehensive, this book presents recent advances in magnetic nanomaterials research, covering the latest developments, including the design and preparation of magnetic nanoparticles, their physical and chemical properties as well as their applications in different fields, including biomedicine, magnetic energy storage, wave-absorbing and water remediation. By allowing researchers to get to the forefront developments related to magnetic nanomaterials in various disciplines, this is invaluable reading for the nano, magnetic, energy, medical, and environmental communities.
Author: D.J. Sellmyer Publisher: Springer Science & Business Media ISBN: 0387233164 Category : Science Languages : en Pages : 514
Book Description
Advanced magnetic nanostructures is an emerging field in magnetism and nanotechnology, but the literature consists of a rich variety of original papers and parts of reviews and books whose scope is comparatively broad. This calls for a book with specific emphasis on state-of-the-art synthetic methods for fabricating, characterizing and theoretically modeling new magnetic nanostructures. This book is intended to provide a comprehensive overview of the present state of the field. Leading researchers world-wide have contributed a survey of their special ties to guide the reader through the exploding literature in nanomagnetic structures. The focus is on deliberately structured nanomagnets. It includes cluster assembled, self-organized and patterned thin films but excludes, for example, multilayered thin films. We target both industrial and academic researchers in magnetism and related areas, such as nanotechnology, materials science, and theoretical solid-state physics.
Author: Bekir Aktas Publisher: Springer Science & Business Media ISBN: 140202200X Category : Science Languages : en Pages : 441
Book Description
Interest in research on nanoscale materials is steadily increasing: nano-structured magnetic materials exhibit new and interesting physical properties, which cannot be found in the bulk. Many of these unique properties have great potential for technical applications in magneto-sensors, bio-sensors, magneto-electronics, data storage, magnetic heads of computer hard disks, single-electron devises, microwave electronic devices, etc. Current research concentrates on device design, synthesis and the characterization of nanostructured materials. The contributions to this book concentrate on magnetic properties of nanoscale magnetic materials, especially on fabrication and characterization, and the physics underlying the unique properties of these structures and devices.
Author: Bekir Aktas Publisher: Springer Science & Business Media ISBN: 3540493360 Category : Technology & Engineering Languages : en Pages : 208
Book Description
This volume addresses the exciting and rapidly developing topic of ultrahigh-density magnetic data storage. It is the most advanced book on magnetic nanostructures, basics and applications. It combines modern topics in nanomagnetism with issues relating to the fabrication and characterization of magnetic nanostructures. This book will be of interest to R and D scientists and it provides an accessible introduction to the essential issues.
Author: Catalin Constantinescu Publisher: Mdpi AG ISBN: 9783036583679 Category : Science Languages : en Pages : 0
Book Description
This volume presents eleven original and experimental research studies and review works on current challenges and trends in magnetic materials, thin films, and nanostructures, with a special focus on the design, synthesis, and characterization of various types of magnetic materials, and the study of their structure-property relationships. The developments in new experimental concepts and their state-of-the-art results, which can lead to the transfer, chemical transformation, and high-resolution patterning of advanced thin films and nanomaterials and to the design and fabrication of devices, are also presented and discussed.
Author: Sabu Thomas Publisher: Elsevier ISBN: 012820883X Category : Technology & Engineering Languages : en Pages : 610
Book Description
Design, Fabrication, and Characterization of Multifunctional Nanomaterials covers major techniques for the design, synthesis, and development of multifunctional nanomaterials. The chapters highlight the main characterization techniques, including X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, energy dispersive X-ray spectroscopy, and scanning probe microscopy.The book explores major synthesis methods and functional studies, including: - Brillouin spectroscopy; - Temperature-dependent Raman spectroscopic studies; - Magnetic, ferroelectric, and magneto-electric coupling analysis; - Organ-on-a-chip methods for testing nanomaterials; - Magnetron sputtering techniques; - Pulsed laser deposition techniques; - Positron annihilation spectroscopy to prove defects in nanomaterials; - Electroanalytic techniques. This is an important reference source for materials science students, scientists, and engineers who are looking to increase their understanding of design and fabrication techniques for a range of multifunctional nanomaterials. - Explains the major design and fabrication techniques and processes for a range of multifunctional nanomaterials; - Demonstrates the design and development of magnetic, ferroelectric, multiferroic, and carbon nanomaterials for electronic applications, energy generation, and storage; - Green synthesis techniques and the development of nanofibers and thin films are also emphasized.
Author: 
Author: 
Author: Natalia Domracheva
Author: Farzad Nasirpouri
Author: Yanglong Hou
Author: David Claudio Gonzalez
Author: D.J. Sellmyer
Author: Bekir Aktas
Author: Bekir Aktas
Author: Catalin Constantinescu
Author: Sabu Thomas