Generation Detection And Manipulation Of Skyrmions In Magnetic Nanostructures
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Generation Detection And Manipulation Of Skyrmions In Magnetic Nanostructures
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Author : Huaiyang Yuan
language : en
Publisher: Frontiers Media SA
Release Date : 2022-09-23
Generation Detection And Manipulation Of Skyrmions In Magnetic Nanostructures written by Huaiyang Yuan and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-09-23 with Science categories.
Skyrmions In Magnetic Materials
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Author : Shinichiro Seki
language : en
Publisher: Springer
Release Date : 2015-11-19
Skyrmions In Magnetic Materials written by Shinichiro Seki and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-11-19 with Computers categories.
This brief reviews current research on magnetic skyrmions, with emphasis on formation mechanisms, observation techniques, and materials design strategies. The response of skyrmions, both static and dynamical, to various electromagnetic fields is also covered in detail. Recent progress in magnetic imaging techniques has enabled the observation of skyrmions in real space, as well as the analysis of their ordering manner and the details of their internal structure. In metallic systems, conduction electrons moving through the skyrmion spin texture gain a nontrivial quantum Berry phase, which provides topological force to the underlying spin texture and enables the current-induced manipulation of magnetic skyrmions. On the other hand, skyrmions in an insulator can induce electric polarization through relativistic spin-orbit interaction, paving the way for the control of skyrmions by an external electric field without loss of Joule heating. Because of its nanometric scale, particle nature, and electric controllability, skyrmions are considered as potential candidates for new information carriers in the next generation of spintronics devices.
Magnetic Skyrmions
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Author : Dipti Ranjan Sahu
language : en
Publisher: BoD – Books on Demand
Release Date : 2021-07-28
Magnetic Skyrmions written by Dipti Ranjan Sahu and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-07-28 with Science categories.
Magnetic skyrmionics is an advanced and active research field, which involves fundamental physics, the creation of efficient next-generation high-density information devices, the formation and manipulation of nanometer-size skyrmions in devices, and the development of compatible materials at room temperature. The magnetic skyrmions found in magnetic materials exhibit spiral magnetism. This book presents a basic overview of magnetic skyrmions along with current research on magnetic skyrmions, emphasizing formation mechanisms and materials design strategies. This book is suitable for an interdisciplinary audience of undergraduates, graduates, engineers, scientists, and researchers in the development of the next generation of spintronic devices.
Nanomagnetism
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Author : Claude Fermon
language : en
Publisher: John Wiley & Sons
Release Date : 2016-12-28
Nanomagnetism written by Claude Fermon and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-12-28 with Science categories.
This first book to focus on the applications of nanomagnetism presents those already realized while also suggesting bold ideas for further breakthroughs. The first part is devoted to the concept of spin electronics and its use for data storage and magnetic sensing, while the second part concentrates on magnetic nanoparticles and their use in industrial environment, biological and medical applications. The third, more prospective part goes on to describe emerging applications related to spin current creation and manipulation, dynamics, spin waves and binary logic based on nano-scale magnetism. With its unique choice of topics and authors, this will appeal to academic as well as corporate researchers in a wide range of disciplines from physics via materials science to engineering, chemistry and life science.
Observation And Electrical Detection Of Magnetic Skyrmions In Iron Germanide Nanostructures
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Author : Matthew John Stolt
language : en
Publisher:
Release Date : 2018
Observation And Electrical Detection Of Magnetic Skyrmions In Iron Germanide Nanostructures written by Matthew John Stolt and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Magnetic skyrmions are topologically protected spin textures that are being heavily investigated for their potential use in next generation information storage. However, transport studies of skyrmions is limited due to the difficulty of their detection especially in nanostructures. Among cubic B20 helimagnets, FeGe has the highest helimagnetic transition temperature of ~280 K. Nanostructures of skyrmion materials, such as B20 FeGe, are highly desired due to the stabilization of the magnetic skyrmion phase brought on by geometrical confinement. In this thesis, I studied the magnetic skyrmion phase in bulk powders and nanostructures of both cubic B20 FeGe and Fe1-xCoxGe alloys via a combination of Lorentz transmission electron microscopy (LTEM), AC magnetic susceptibility (ACMS), and magnetotransport measurements. Prior to this work, powders of cubic B20 Fe1-xCoxGe alloys were only known to form under high pressures (~4 GPa) and high temperatures (~ 1000 °C), however it was found that Fe1-xCoxGe alloys can form in the B20 structure using elemental precursors reacted at moderate temperatures (~550 °C). During the course of this study, a new skyrmion material, Fe0.95Co0.05Ge, was discovered and its entire magnetic phase diagram was mapped out using ACMS. The powders were then used as seeds in the chemical vapor deposition reactions used to grow both FeGe nanowires (NWs) and Fe1-xCoxGe nanoplates (NPLs). LTEM detected the different magnetic states (helimagnetic, magnetic skyrmion, conical, and field polarized) present in the NWs and NPLs. In both nanostructures, their magnetic skyrmion phases were observed to be far more stable than their bulk counterparts. Magnetoresistance measurements were used to electrically detect the different magnetic phase transitions in both the FeGe NWs and Fe1-xCoxGe NPLs as well as probe their anisotropic electrical signals. The Fe1-xCoxGe NPLs 2D geometry allowed for facile fabrication and detection of the magnetic skyrmion phase using Hall effect measurements. The topological Hall effect, which has been established as the electrical signature of the magnetic skyrmion phase, was detected in the NPLs and used study the stability region of the magnetic skyrmion lattice. The use of the LTEM imaging of these FeGe nanostructures in conjunction with the magnetotransport detection methods lays the solid foundation for future studies of skyrmion-based devices to realize their full potential in information storage technologies.
Novel Magnetic Nanostructures
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Author : Natalia Domracheva
language : en
Publisher: Elsevier
Release Date : 2018-06-14
Novel Magnetic Nanostructures written by Natalia Domracheva and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-14 with Technology & Engineering categories.
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
Nanoscale Matter And Principles For Sensing And Labeling Applications
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Author : Dambarudhar Mohanta
language : en
Publisher: Springer Nature
Release Date : 2024
Nanoscale Matter And Principles For Sensing And Labeling Applications written by Dambarudhar Mohanta and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024 with Detectors categories.
Zusammenfassung: This book is a compilation of carefully chosen chapters that cover the subjects of nanoscale matter, sensing, and labelling applications. It is aimed primarily at scientists and researchers who are already involved in theme-based research or who are just starting their careers. Despite the diverse nature of the topics covered, which include a range of materials in various forms and uses, the emphasis is primarily on sensing and labelling phenomena. The book begins with materials quantification in nanoscale systems by using an innovative technique like "molecular secondary ion mass spectrometry without calibration standards". Subsequently, the book features an array of materials such as inorganic semiconductor nanoscale particles, carbon dots, rare-earth oxides, polymer nanocomposites, and a few biomaterials, all of which illustrate their functionality and potential for deployment in a wide variety of sensing applications. Although the book delves into the technical aspects of fabrication workouts to some extent, the focus is predominantly on the physical principles, mechanisms, and relevance involved in sensing and labelling applications. The book covers a wide range of topics that leverage the unique properties of nanoscale materials. By carefully selecting appropriate active materials, the authors explore the detection of LPG, hazardous and explosive gases, as well as humidity sensing and hydrogen evolution. It also delves into photo-sensing and persistent photoconductivity by using nanoscale semiconductors, which are used for heavy metal sensing and UV sensing, respectively. The use of metal nanoparticles in various forms is reviewed to address issues related to water contamination, biofilm protection, and food-borne pathogens. The book also discusses surface plasmon resonance, starting with its basic principles and expanding to its relevance in a broader perspective, with a greater focus on applied biosensing. Nanoscale ferrites and magnetic systems are explored with an emphasis on magnetic sensing and actuation. Lastly, the book explores the use of rare-earth-based nanosystems, highlighting persistent luminescence and up/down-converted transitions, which have unprecedented applications in bioimaging and biolabeling. Every effort has been made to strike a balance between the observed phenomena in the emerging areas of sensing applications and suitable theoretical treatments there in.
Stability Transformation And Detection Of Topological Magnetic Spin Textures In Nanostructures
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Author : Nitish Mathur
language : en
Publisher:
Release Date : 2022
Stability Transformation And Detection Of Topological Magnetic Spin Textures In Nanostructures written by Nitish Mathur and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.
Topology, a branch of mathematics that successfully describes several fundamental physical phenomena in the field of condensed matter physics. Understanding the role of topology plays in materials science has led to the development of several material platforms which come under the category of topological materials. The properties associated with the topological states in materials are robust against the continuous transformation and small perturbations that do not change topology. Hence, the research behind the exploration and utilization of topological materials in a goal specific application is currently advancing with a frantic pace.In magnetic materials, the marriage of topology and magnetism exists as a new form of magnetic ordering with whirlpool-like spin arrangements known as magnetic skyrmions. These topologically protected particle-like spin textures were first discovered a decade ago in non-centrosymmetric magnetic materials. Confining magnetic skyrmions in nanostructures leads to interesting fundamental insights on skyrmion stability and could provide convenient platforms for potential practical applications of skyrmions in information storage technology. In Chapter 1, I have introduced and summarized the recent advances on studying magnetic skyrmions in nanostructures of skyrmion hosting non-centrosymmetric materials (especially the cubic B20 materials) made via bottom-up synthesis or top-down fabrication methods. I further discussed various real space imaging (such as Lorentz transmission electron microscopy or electron holography) or physical property measurement (such as magneto-transport) techniques that have been used to observe and detect these exotic magnetic domains in both nanostructure and bulk samples, which have proven critical to fully understanding them. The morphology and dimensionality of skyrmion hosting materials in stabilizing isolated magnetic skyrmions in confined geometry and their benefits are critical for the implementation in magnetic memory applications. In Chapters 3 and 4, I have presented a comprehensive study of purely electrical detection methods corroborated with real space observation of magnetic skyrmions. This allows us to develop a complete toolkit to investigate stability, magnetic phase transformation and detection of magnetic skyrmion in confined geometries of nanostructures. With these investigations, we extend our understanding of the three-dimensional spin structure (known as skyrmion strings) in confined geometries of nanostructures. Magnetism mediated by symmetry breaking is ubiquitous in condensed matter systems as also depicted in case of non-centrosymmetric skyrmion hosts. Intrinsic crystal defects are often unavoidable during the growth processes of materials which break the local symmetry of the crystal in the vicinity of the defect site and could potentially influence the magnetic spin ordering. In Chapter 2, I have discussed the role of defects in controlling and manipulating the key fundamental properties in widely explored two-dimensional (2D) van der Waals (vdW) materials. Defect-tunable magnetism has not been studied in broad class of 2D magnetic van der Waals (vdW) materials. Furthermore, it might lead to an inaccurate interpretation of intrinsic magnetic ordering in 2D vdW magnets if the presence of crystal defects is not acknowledged with detailed structural characterization. In Chapter 5, I presented a study of defect-mediated ferromagnetism influenced by the presence of sulfur vacancy defects in strongly correlated 2D vdW antiferromagnet of NiPS3. These findings demonstrate the concept of tuning defect-mediated magnetic interactions to manipulate spin ordering in magnetic vdW materials. Interestingly, defects like dislocation in materials are distinguishable from other lattice imperfections as these are characterized by topological invariant known as Burgers vector and they fall under the category of topological defects. In Chapter 6, we have designed a first ever controlled vapor deposition method for the screw dislocation driven growth of layered vdW antiferromagnets, namely NiI2 and NiBr2. The presence of screw dislocation in magnetic vdW materials could allow the exploration of dislocation-spin interactions and magnetic spin structures that are governed by the principles of topology.
Magnetic Skyrmions And Their Applications
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Author : Giovanni Finocchio
language : en
Publisher: Woodhead Publishing
Release Date : 2021-06-03
Magnetic Skyrmions And Their Applications written by Giovanni Finocchio and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-06-03 with Technology & Engineering categories.
Magnetic skyrmions are particle-like objects described by localized solutions of non-linear partial differential equations. Up until a few decades ago, it was believed that magnetic skyrmions only existed in condensed matter as short-term excitations that would quickly collapse into linear singularities. The contrary was proven theoretically in 1989 and evidentially in 2009. It is now known that skyrmions can exist as long-living metastable configurations in low-symmetry condensed matter systems with broken mirror symmetry, increasing the potential applications possible. Magnetic Skyrmions and their Applications delves into the fundamental principles and most recent research and developments surrounding these unique magnetic particles. Despite achievements in the synthesis of systems stabilizing chiral magnetic skyrmions and the variety of experimental investigations and numerical calculations, there have not been many summaries of the fundamental physical principles governing magnetic skyrmions or integrating those concepts with methods of detection, characterization and potential applications. Magnetic Skyrmions and their Applications delivers a coherent, state-of-the-art discussion on the current knowledge and potential applications of magnetic skyrmions in magnetic materials and device applications. First the book reviews key concepts such as topology, magnetism and materials for magnetic skyrmions. Then, charactization methods, physical mechanisms, and emerging applications are discussed. Covers background knowledge and details the basic principles of magnetic skyrmions, including materials, characterization, statics and dynamics Reviews materials for skyrmion stabilization including bulk materials and interface-dominated multilayer materials Describes both well-known and unconventional applications of magnetic skyrmions, such as memristors and reservoir computing
Solid State Physics
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Author :
language : en
Publisher: Elsevier
Release Date : 2022-10-28
Solid State Physics written by and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-10-28 with Science categories.
Solid State Physics, Volume 73, the latest release in this serial that highlights new advances in the field, presents interesting chapters on a variety of current topics in the field, with each chapter written by an international board of authors. Provides the authority and expertise of leading contributors from an international board of authors Presents the latest release in Solid State Physics