Off Axis Electron Holography Of Isolated Ferromagnetic Nanowires

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Off-Axis Electron Holography of Isolated Ferromagnetic Nanowires

Author : Azadeh Akhtari-Zavareh
Publisher :
ISBN 13 :
Total Pages : 149 pages
Book Rating : 4.:/5 (112 download)

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Book Synopsis Off-Axis Electron Holography of Isolated Ferromagnetic Nanowires by : Azadeh Akhtari-Zavareh

Download or read book Off-Axis Electron Holography of Isolated Ferromagnetic Nanowires written by Azadeh Akhtari-Zavareh and published by . This book was released on 2014 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: The investigations carried out in this thesis involved the nanoscale characterization of isolated ferromagnetic nanowires (NWs) using off-axis electron holography (EH), high-resolution transmission electron microscopy, scanning transmission electron microscopy and energy dispersive spectroscopy. The research focused on two categories of NWs, single phase CoFeB NWs and multilayer CoFeB/Cu NWs, which were fabricated by pulsed-current electrodeposition in nanoporous alumina membranes as an array of NWs. EH has been used to investigate the local magnetic behavior of the isolated NWs in their remanent state. In addition, the uniformity in diameter, composition, crystal structure of individual NWs were investigated. Single phase CoFeB ferromagnetic NWs, with diameters ranging between 20 to 170 nm, were studied. Electron diffraction patterns indicated that the NWs were nanocrystalline, BCC CoFeB, with grain sizes up to 20 nm × 20 nm. Holograms from EH showed that the magnetization inside the NWs was uniform over most of their length, except at their edges. Since the NWs consisted of soft magnetic nanocrystals, the magnetic anisotropy was likely dominated by the shape anisotropy. Numerical simulations suggested that the stray field at the tips of the NWs was well reproduced by a truncated cone model, rather than a cylinder. The average magnetic induction was 1.4 ± 0.3 T. Multilayer NWs consisted of periodic magnetic layers of CoFeB alloys and non-magnetic layers of Cu. Individual NW compositions, crystallinity, and layer thicknesses were calibrated using scanning transmission electron microscopy and energy dispersive spectroscopy. These properties were found to be significantly different from their expected nominal values assumed for the arrays, based on single-phase growth rates. Diffraction patterns obtained from the NWs again showed that both the CoFeB and Cu layers were nanocrystalline (BCC CoFeB, FCC Cu) but that the CoFeB layers had a significant atomic fraction of Cu, despite the small concentration of Cu used in the electrolyte. Nevertheless, the average magnetic induction of individual CoFeB layers ranged between 0.5 and 1.5 T, depending upon the thickness of the layer, from 50 nm to 250 nm, and the direction of an external magnetic field applied in situ. The magnetization was axial for all external field directions when the CoFeB layer was thicker than the diameter (45 nm), while for thin CoFeB and Cu layers (

ELECTRON HOLOGRAPHY.

Author : Akira Tonomura
Publisher : Springer Science & Business Media
ISBN 13 : 9783540645559
Total Pages : 180 pages
Book Rating : 4.6/5 (455 download)

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Book Synopsis ELECTRON HOLOGRAPHY. by : Akira Tonomura

Download or read book ELECTRON HOLOGRAPHY. written by Akira Tonomura and published by Springer Science & Business Media. This book was released on 1999-07-02 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an introduction to electron holography, a newly developed technique for observing and measuring microscopic structures of matter and fields using the wave nature of electrons. It describes principles, experimental details, and observation examples for vortices in superconductors, the magnetic domain structure in ferromagnets, and for fundamental phenomena of quantum mechanics.

Quantitative Off-axis Electron Holography and (multi-)ferroic Interfaces

Author : Axel Lubk
Publisher :
ISBN 13 :
Total Pages : 150 pages
Book Rating : 4.:/5 (724 download)

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Book Synopsis Quantitative Off-axis Electron Holography and (multi-)ferroic Interfaces by : Axel Lubk

Download or read book Quantitative Off-axis Electron Holography and (multi-)ferroic Interfaces written by Axel Lubk and published by . This book was released on 2010 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Quantitative Off-axis Electron Holography and (multi- )ferroic Interfaces

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (652 download)

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Book Synopsis Quantitative Off-axis Electron Holography and (multi- )ferroic Interfaces by :

Download or read book Quantitative Off-axis Electron Holography and (multi- )ferroic Interfaces written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A particularly interesting class of modern materials is ferroic ceramics. Their characteristic order parameter is a result of quantum chemistry taking place on a sub-Å length scale and long-range couplings, e.g. mediated by electrostatic or stress fields. Furthermore, the particular subclass of multiferroics possesses more than one order parameter and exhibits an intriguing coupling between them, which is interesting both from the fundamental physics point of view as well as from a technological vantage point. While on a more fundamental level it is desirable to elucidate the physical details of the coupling mechanism, this knowledge could subsequently lead to new and technologically interesting multiferroic materials, which overcome their current drawback that only one of the multiple order parameters is appreciably large while the others stay small. Due to the short and long range nature of the driving forces, one challenge for thoroughly understanding ferroic ceramics is the characterization of material properties within a large interval of length scales from several tens of æm to sub-Å. To that end, it is useful to exploit that all order parameters can be described as macroscopic fields, e.g. electric polarization or strain, which, in turn, can be either directly or indirectly probed with an electron beam such as used in Transmission Electron Microscopy (TEM). Consequently, TEM is excellently suited for investigating ferroic materials, i.e., state-of-the-art instruments facilitate aberration corrected imaging within a large magnification interval covering the length scales of interest, in particular the atomic regime. A general drawback of conventional TEM techniques is the loss of phase information originally contained in the scattered electron wave introduced by recording only the electron density. Electron Holography is an advanced TEM technique that facilitates the complete evaluation of the complex electron wave, which, in combination with the manifold poss.

Magnetic Nano- and Microwires

Author : Manuel Vázquez
Publisher : Woodhead Publishing
ISBN 13 : 0081028334
Total Pages : 1012 pages
Book Rating : 4.0/5 (81 download)

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Book Synopsis Magnetic Nano- and Microwires by : Manuel Vázquez

Download or read book Magnetic Nano- and Microwires written by Manuel Vázquez and published by Woodhead Publishing. This book was released on 2020-04-01 with total page 1012 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Nano-and Microwires: Design, Synthesis, Properties and Applications, Second Edition, reviews the growth and processing of nanowires and nanowire heterostructures using such methods as sol-gel and electrodeposition, focused-electron/ion-beam-induced deposition, epitaxial growth by chemical vapor transport, and more. Other sections cover engineering nanoporous anodic alumina, discuss magnetic and transport properties, domains, domain walls in nano-and microwires. and provide updates on skyrmions, domain walls, magnetism and transport, and the latest techniques to characterize and analyze these effects. Final sections cover applications, both current and emerging, and new chapters on memory, sensor, thermoelectric and nanorobotics applications. This book will be an ideal resource for academics and industry professionals working in the disciplines of materials science, physics, chemistry, electrical and electronic engineering and nanoscience. Details the multiple key techniques for the growth, processing and characterization of nanowires and microwires Reviews the principles and difficulties involved in applying magnetic nano- and microwires to a wide range of applications, also including biomedical and sensing applications Discusses magnetism and transport in nanowires, skyrmions and domain walls in nanowires and the latest innovations in magnetic imaging

Multiferroics

Author : Andres Cano
Publisher : Walter de Gruyter GmbH & Co KG
ISBN 13 : 3110581043
Total Pages : 538 pages
Book Rating : 4.1/5 (15 download)

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Book Synopsis Multiferroics by : Andres Cano

Download or read book Multiferroics written by Andres Cano and published by Walter de Gruyter GmbH & Co KG. This book was released on 2021-06-21 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiferroics, materials with a coexistence of magnetic and ferroelectric order, provide an efficient route for the control of magnetism by electric fields. The authors cover multiferroic thin-film heterostructures, device architectures and domain/interface effects. They critically discuss achievements as well as limitations and assess opportunities for future applications.

Handbook of Magnetic Materials

Author : Ekkes H. Brück
Publisher : Elsevier
ISBN 13 : 0444641629
Total Pages : 424 pages
Book Rating : 4.4/5 (446 download)

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Book Synopsis Handbook of Magnetic Materials by : Ekkes H. Brück

Download or read book Handbook of Magnetic Materials written by Ekkes H. Brück and published by Elsevier. This book was released on 2018-11-21 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Magnetic Materials, Volume 27, covers the expansion of magnetism over the last few decades and its applications in research, notably the magnetism of several classes of novel materials that share the presence of magnetic moments with truly ferromagnetic materials. The book is an ideal reference for scientists active in magnetism research, providing readers with novel trends and achievements in magnetism. Each article contains an extensive description given in graphical, as well as, tabular form, with much emphasis placed on the discussion of the experimental material within the framework of physics, chemistry and materials science. Comprises topical review articles written by leading authorities Includes a variety of self-contained introductions to a given area in the field of magnetism without requiring recourse to the published literature Introduces given topics in the field of magnetism Describes novel trends and achievements in magnetism

Handbook of Magnetic Materials

Author : Ekkes H. Brück
Publisher : Elsevier
ISBN 13 : 0128210249
Total Pages : 216 pages
Book Rating : 4.1/5 (282 download)

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Book Synopsis Handbook of Magnetic Materials by : Ekkes H. Brück

Download or read book Handbook of Magnetic Materials written by Ekkes H. Brück and published by Elsevier. This book was released on 2020-11-29 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Magnetic Materials, Volume 29, highlights new advances in the field, with this new volume presenting interesting chapters written by an international board of authors on topics such as spin-orbit torque. Provides the authority and expertise of leading contributors from an international board of authors Presents the latest release in the Handbook of Magnetic Materials series

Springer Handbook of Microscopy

Author : Peter W. Hawkes
Publisher : Springer Nature
ISBN 13 : 3030000699
Total Pages : 1561 pages
Book Rating : 4.0/5 (3 download)

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Book Synopsis Springer Handbook of Microscopy by : Peter W. Hawkes

Download or read book Springer Handbook of Microscopy written by Peter W. Hawkes and published by Springer Nature. This book was released on 2019-11-02 with total page 1561 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book features reviews by leading experts on the methods and applications of modern forms of microscopy. The recent awards of Nobel Prizes awarded for super-resolution optical microscopy and cryo-electron microscopy have demonstrated the rich scientific opportunities for research in novel microscopies. Earlier Nobel Prizes for electron microscopy (the instrument itself and applications to biology), scanning probe microscopy and holography are a reminder of the central role of microscopy in modern science, from the study of nanostructures in materials science, physics and chemistry to structural biology. Separate chapters are devoted to confocal, fluorescent and related novel optical microscopies, coherent diffractive imaging, scanning probe microscopy, transmission electron microscopy in all its modes from aberration corrected and analytical to in-situ and time-resolved, low energy electron microscopy, photoelectron microscopy, cryo-electron microscopy in biology, and also ion microscopy. In addition to serving as an essential reference for researchers and teachers in the fields such as materials science, condensed matter physics, solid-state chemistry, structural biology and the molecular sciences generally, the Springer Handbook of Microscopy is a unified, coherent and pedagogically attractive text for advanced students who need an authoritative yet accessible guide to the science and practice of microscopy.

Science of Microscopy

Author : P.W. Hawkes
Publisher : Springer Science & Business Media
ISBN 13 : 0387497625
Total Pages : 1336 pages
Book Rating : 4.3/5 (874 download)

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Book Synopsis Science of Microscopy by : P.W. Hawkes

Download or read book Science of Microscopy written by P.W. Hawkes and published by Springer Science & Business Media. This book was released on 2008-08-29 with total page 1336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This fully corrected second impression of the classic 2006 text on microscopy runs to more than 1,000 pages and covers up-to-the-minute developments in the field. The two-volume work brings together a slew of experts who present comprehensive reviews of all the latest instruments and new versions of the older ones, as well as their associated operational techniques. The chapters draw attention to their principal areas of application. A huge range of subjects are benefiting from these new tools, including semiconductor physics, medicine, molecular biology, the nanoworld in general, magnetism, and ferroelectricity. This fascinating book will be an indispensable guide for a wide range of scientists in university laboratories as well as engineers and scientists in industrial R&D departments.

Optical Angular Momentum

Author : L. Allen
Publisher : CRC Press
ISBN 13 : 1482269015
Total Pages : 316 pages
Book Rating : 4.4/5 (822 download)

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Book Synopsis Optical Angular Momentum by : L. Allen

Download or read book Optical Angular Momentum written by L. Allen and published by CRC Press. This book was released on 2016-04-19 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spin angular momentum of photons and the associated polarization of light has been known for many years. However, it is only over the last decade or so that physically realizable laboratory light beams have been used to study the orbital angular momentum of light. In many respects, orbital and spin angular momentum behave in a similar manner, but t

Liquid Cell Electron Microscopy

Author : Frances M. Ross
Publisher : Cambridge University Press
ISBN 13 : 1107116570
Total Pages : 529 pages
Book Rating : 4.1/5 (71 download)

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Book Synopsis Liquid Cell Electron Microscopy by : Frances M. Ross

Download or read book Liquid Cell Electron Microscopy written by Frances M. Ross and published by Cambridge University Press. This book was released on 2017 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: 2.6.2 Electrodes for Electrochemistry

Micromagnetism and the Microstructure of Ferromagnetic Solids

Author : Helmut Kronmüller
Publisher : Cambridge University Press
ISBN 13 : 9780521331357
Total Pages : 466 pages
Book Rating : 4.3/5 (313 download)

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Book Synopsis Micromagnetism and the Microstructure of Ferromagnetic Solids by : Helmut Kronmüller

Download or read book Micromagnetism and the Microstructure of Ferromagnetic Solids written by Helmut Kronmüller and published by Cambridge University Press. This book was released on 2003-08-28 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main theme of this book is micromagnetism and microstructure as well as the analysis of the relations between characteristic properties of the hysteresis loop and microstructure. Also presented is an analysis of the role of microstructure in the fundamental magnetic properties (for example, magnetorestriction or critical behaviour) of crystalline and amorphous alloys. The authors apply the theory of micromagnetism to all aspects of advanced magnetic materials including domain patterns and magnetization processes under the influence of defect structures. Coverage includes modern developments in computational micromagnetism and its application to spin structures of small particles and platelets. It will be of interest to researchers and graduate students in condensed matter, physics, electrical engineering and materials science, as well as to industrial researchers working in the electrotechnical and recording industry.

Introduction to Electron Holography

Author : Edgar Völkl
Publisher : Springer Science & Business Media
ISBN 13 : 1461548179
Total Pages : 362 pages
Book Rating : 4.4/5 (615 download)

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Book Synopsis Introduction to Electron Holography by : Edgar Völkl

Download or read book Introduction to Electron Holography written by Edgar Völkl and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experienced and novice holographers receive a solid foundation in the theory and practice of holography, the next generation of imaging technology, in this superb text. The book's `how to' aspects enable readers to learn hologram acquisition at the microscope and processing of holograms at the computer as well as digital imaging techniques. A complete bibliography on electron holography and applications of the method to problems in materials science, physics and the life sciences round out the volume's coverage.

Magnetic Microscopy of Nanostructures

Author : Herbert Hopster
Publisher : Springer Science & Business Media
ISBN 13 : 3540266410
Total Pages : 324 pages
Book Rating : 4.5/5 (42 download)

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Book Synopsis Magnetic Microscopy of Nanostructures by : Herbert Hopster

Download or read book Magnetic Microscopy of Nanostructures written by Herbert Hopster and published by Springer Science & Business Media. This book was released on 2006-03-30 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive collection of overview articles on novel microscopy methods for imaging magnetic structures on the nanoscale. Written by leading scientists in the field, the book covers synchrotron based methods, spin-polarized electron methods, and scanning probe techniques. It constitutes a valuable source of reference for graduate students and newcomers to the field.

Magnetic Nano- and Microwires

Author : Manuel Vázquez
Publisher : Woodhead Publishing
ISBN 13 : 0081001819
Total Pages : 847 pages
Book Rating : 4.0/5 (81 download)

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Book Synopsis Magnetic Nano- and Microwires by : Manuel Vázquez

Download or read book Magnetic Nano- and Microwires written by Manuel Vázquez and published by Woodhead Publishing. This book was released on 2015-05-27 with total page 847 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic nanowires and microwires are key tools in the development ofenhanced devices for information technology (memory and data processing) andsensing. Offering the combined characteristics of high density, high speed, andnon-volatility, they facilitate reliable control of the motion of magnetic domainwalls; a key requirement for the development of novel classes of logic and storagedevices. Part One introduces the design and synthesis of magnetic nanowires andmicrowires, reviewing the growth and processing of nanowires and nanowireheterostructures using such methods as sol-gel and electrodepositioncombinations, focused-electron/ion-beam-induced deposition, chemicalvapour transport, quenching and drawing and magnetic interactions. Magneticand transport properties, alongside domain walls, in nano- and microwiresare then explored in Part Two, before Part Three goes on to explore a widerange of applications for magnetic nano- and microwire devices, includingmemory, microwave and electrochemical applications, in addition to thermalspin polarization and configuration, magnetocalorific effects and Bloch pointdynamics. Detailed coverage of multiple key techniques for the growth and processing of nanowires and microwires Reviews the principles and difficulties involved in applying magnetic nano- and microwires to a wide range of applications Combines the expertise of specialists from around the globe to give a broad overview of current and future trends

Handbook of Spintronics

Author : Yongbing Xu
Publisher : Springer
ISBN 13 : 9789400768918
Total Pages : 0 pages
Book Rating : 4.7/5 (689 download)

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Book Synopsis Handbook of Spintronics by : Yongbing Xu

Download or read book Handbook of Spintronics written by Yongbing Xu and published by Springer. This book was released on 2015-10-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over two volumes and 1500 pages, the Handbook of Spintronics will cover all aspects of spintronics science and technology, including fundamental physics, materials properties and processing, established and emerging device technology and applications. Comprising 60 chapters from a large international team of leading researchers across academia and industry, the Handbook provides readers with an up-to-date and comprehensive review of this dynamic field of research. The opening chapters focus on the fundamental physical principles of spintronics in metals and semiconductors, including an introduction to spin quantum computing. Materials systems are then considered, with sections on metallic thin films and multilayers, magnetic tunnelling structures, hybrids, magnetic semiconductors and molecular spintronic materials. A separate section reviews the various characterisation methods appropriate to spintronics materials, including STM, spin-polarised photoemission, x-ray diffraction techniques and spin-polarised SEM. The third part of the Handbook contains chapters on the state of the art in device technology and applications, including spin valves, GMR and MTJ devices, MRAM technology, spin transistors and spin logic devices, spin torque devices, spin pumping and spin dynamics and other topics such as spin caloritronics. Each chapter considers the challenges faced by researchers in that area and contains some indications of the direction that future work in the field is likely to take. This reference work will be an essential and long-standing resource for the spintronics community.