Quantitative Phase Imaging Of Magnetic Nanostructures Using Off Axis Electron Holography

Download Quantitative Phase Imaging Of Magnetic Nanostructures Using Off Axis Electron Holography full books in PDF, epub, and Kindle. Read online Quantitative Phase Imaging Of Magnetic Nanostructures Using Off Axis Electron Holography ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!

Quantitative Phase Imaging of Magnetic Nanostructures Using Off-axis Electron Holography

Author : Kai He
Publisher :
ISBN 13 :
Total Pages : 131 pages
Book Rating : 4.:/5 (81 download)

DOWNLOAD NOW!

Book Synopsis Quantitative Phase Imaging of Magnetic Nanostructures Using Off-axis Electron Holography by : Kai He

Download or read book Quantitative Phase Imaging of Magnetic Nanostructures Using Off-axis Electron Holography written by Kai He and published by . This book was released on 2010 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research of this dissertation has involved the nanoscale quantitative characterization of patterned magnetic nanostructures and devices using off-axis electron holography and Lorentz microscopy. The investigation focused on different materials of interest, including monolayer Co nanorings, multilayer Co/Cu/Py (Permalloy, Ni81Fe19) spin-valve nanorings, and notched Py nanowires, which were fabricated via a standard electron-beam lithography (EBL) and lift-off process. Magnetization configurations and reversal processes of Co nanorings, with and without slots, were observed. Vortex-controlled switching behavior with stepped hysteresis loops was identified, with clearly defined onion states, vortex states, flux-closure (FC) states, and Omega states. Two distinct switching mechanisms for the slotted nanorings, depending on applied field directions relative to the slot orientations, were attributed to the vortex chirality and shape anisotropy. Micromagnetic simulations were in good agreement with electron holography observations of the Co nanorings, also confirming the switching field of 700-800 Oe. Co/Cu/Py spin-valve slotted nanorings exhibited different remanent states and switching behavior as a function of the different directions of the applied field relative to the slots. At remanent state, the magnetizations of Co and Py layers were preferentially aligned in antiparallel coupled configuration, with predominant configurations in FC or onion states. Two-step and three-step hysteresis loops were quantitatively determined for nanorings with slots perpendicular, or parallel to the applied field direction, respectively, due to the intrinsic coercivity difference and interlayer magnetic coupling between Co and Py layers. The field to reverse both layers was on the order of ~800 Oe. Domain-wall (DW) motion within Py nanowires (NWs) driven by an in situ magnetic field was visualized and quantified. Different aspects of DW behavior, including nucleation, injection, pinning, depinning, relaxation, and annihilation, occurred depending on applied field strength. A unique asymmetrical DW pinning behavior was recognized, depending on DW chirality relative to the sense of rotation around the notch. The transverse DWs relaxed into vortex DWs, followed by annihilation in a reversed field, which was in agreement with micromagnetic simulations. Overall, the success of these studies demonstrated the capability of off-axis electron holography to provide valuable insights for understanding magnetic behavior on the nanoscale.

Quantitative Phase Imaging of Metallic Nanostructures Using Off-axis Electron Holography

Author : Jesus Cantu-Valle
Publisher :
ISBN 13 : 9781321473698
Total Pages : 101 pages
Book Rating : 4.4/5 (736 download)

DOWNLOAD NOW!

Book Synopsis Quantitative Phase Imaging of Metallic Nanostructures Using Off-axis Electron Holography by : Jesus Cantu-Valle

Download or read book Quantitative Phase Imaging of Metallic Nanostructures Using Off-axis Electron Holography written by Jesus Cantu-Valle and published by . This book was released on 2014 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation the quantitative characterization of metallic nanostructures of different size, shape and composition by means of advanced electron microscopy techniques is presented. It is well known that transmission electron microscopy (TEM) has the ability to resolve the atomic structure of materials, but conventional TEM methods do not give all the information that would describe the physical behavior of nanomaterials. In this dissertation an advanced phase reconstruction technique that can be used to characterize electric and magnetic fields is presented, off-axis electron holography. The combination of electron holography with other electron microscopy techniques is crucial to obtain better insights on the structure-property relationship in nanomaterials. Electron holography is a leading-edge technology which utilizes the interference effect of the electron wave and can detect and quantify the electromagnetic field on the nanometer scale. The purpose of this dissertation is to remark the capabilities of the technique as a powerful tool for the characterization of novel nanostructured materials.

Characterization of Magnetic Nanostructures Using Off-axis Electron Holography

Author : Desai Zhang
Publisher :
ISBN 13 :
Total Pages : 126 pages
Book Rating : 4.:/5 (911 download)

DOWNLOAD NOW!

Book Synopsis Characterization of Magnetic Nanostructures Using Off-axis Electron Holography by : Desai Zhang

Download or read book Characterization of Magnetic Nanostructures Using Off-axis Electron Holography written by Desai Zhang and published by . This book was released on 2015 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation research has involved microscopic characterization of magnetic nanostructures using off-axis electron holography and Lorentz microscopy. The nanostructures investigated have included Co nanoparticles (NPs), Au/Fe/GaAs shell/core nanowires (NWs), carbon spirals with magnetic cores, magnetic nanopillars, Ni-Zn-Co spinel ferrite and CoFe/Pd multilayers. The studies have confirmed the capability of holography to describe the behavior of magnetic structures at the nanoscale. The phase changes caused by the fringing fields of chains consisting of Co NPs were measured and calculated. The difference between chains with different numbers of Co NPs followed the trend indicated by calculations. Holography studies of Au/Fe/GaAs NWs grown on (110) GaAs substrates with rotationally non-uniform coating confirmed that Fe was present in the shell and that the shell behaved as a bar magnet. No fringing field was observed from NWs with cylindrical coating grown on (111)B GaAs substrates. The most likely explanation is that magnetic fields are confined within the shells and form closed loops. The multiple-magnetic-domain structure of iron carbide cores in carbon spirals was imaged using phase maps of the fringing fields. The strength and range of this fringing field was insufficient for manipulating the carbon spirals with an external applied magnetic field. No magnetism was revealed for CoPd/Fe/CoPd magnetic nanopillars. Degaussing and MFM scans ruled out the possibility that saturated magnetization and sample preparation had degraded the anisotropy, and the magnetism, respectively. The results suggested that these nanopillars were not suitable as candidates for prototypical bit information storage devices. Observations of Ni-Zn-Co spinel ferrite thin films in plan-view geometry indicated a multigrain magnetic domain structure and the magnetic fields were oriented in-plane only with no preferred magnetization distribution. This domain structure helps explain this ferrite's high permeability at high resonance frequency, which is an unusual character. Perpendicular magnetic anisotropy (PMA) of CoFe/Pd multilayers was revealed using holography. Detailed microscopic characterization showed structural factors such as layer waviness and interdiffusion that could contribute to degradation of the PMA. However, these factors are overwhelmed by the dominant effect of the CoFe layer thickness, and can be ignored when considering magnetic domain structure.

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)

DOWNLOAD NOW!

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.

Handbook of Nanoscopy

Author : Gustaaf van Tendeloo
Publisher : John Wiley & Sons
ISBN 13 : 3527641874
Total Pages : 1484 pages
Book Rating : 4.5/5 (276 download)

DOWNLOAD NOW!

Book Synopsis Handbook of Nanoscopy by : Gustaaf van Tendeloo

Download or read book Handbook of Nanoscopy written by Gustaaf van Tendeloo and published by John Wiley & Sons. This book was released on 2012-12-21 with total page 1484 pages. Available in PDF, EPUB and Kindle. Book excerpt: This completely revised successor to the Handbook of Microscopy supplies in-depth coverage of all imaging technologies from the optical to the electron and scanning techniques. Adopting a twofold approach, the book firstly presents the various technologies as such, before going on to cover the materials class by class, analyzing how the different imaging methods can be successfully applied. It covers the latest developments in techniques, such as in-situ TEM, 3D imaging in TEM and SEM, as well as a broad range of material types, including metals, alloys, ceramics, polymers, semiconductors, minerals, quasicrystals, amorphous solids, among others. The volumes are divided between methods and applications, making this both a reliable reference and handbook for chemists, physicists, biologists, materials scientists and engineers, as well as graduate students and their lecturers.

LORENTZ PHASE IMAGING AND IN-SITU LORENTZ MICROSCOPY OF PATTERNED CO-ARRAYS.

Author : V. V.ZHU VOLKOV (Y.)
Publisher :
ISBN 13 :
Total Pages : 2 pages
Book Rating : 4.:/5 (316 download)

DOWNLOAD NOW!

Book Synopsis LORENTZ PHASE IMAGING AND IN-SITU LORENTZ MICROSCOPY OF PATTERNED CO-ARRAYS. by : V. V.ZHU VOLKOV (Y.)

Download or read book LORENTZ PHASE IMAGING AND IN-SITU LORENTZ MICROSCOPY OF PATTERNED CO-ARRAYS. written by V. V.ZHU VOLKOV (Y.) and published by . This book was released on 2003 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding magnetic structures and properties of patterned and ordinary magnetic films at nanometer length-scale is the area of immense technological and fundamental scientific importance. The key feature to such success is the ability to achieve visual quantitative information on domain configurations with a maximum ''magnetic'' resolution. Several methods have been developed to meet these demands (Kerr and Faraday effects, differential phase contrast microscopy, magnetic force microscopy, SEMPA etc.). In particular, the modern off-axis electron holography allows retrieval of the electron-wave phase shifts down to 2{pi}/N (with typical N = 10-20, approaching in the limit N {approx} 100) in TEM equipped with field emission gun, which is already successfully employed for studies of magnetic materials at nanometer scale. However, it remains technically demanding, sensitive to noise and needs highly coherent electron sources. As possible alternative we developed a new method of Lorentz phase microscopy [1,2] based on the Fourier solution [3] of magnetic transport-of-intensity (MTIE) equation. This approach has certain advantages, since it is less sensitive to noise and does not need high coherence of the source required by the holography. In addition, it can be realized in any TEM without basic hardware changes. Our approach considers the electron-wave refraction in magnetic materials (magnetic refraction) and became possible due to general progress in understanding of noninterferometric phase retrieval [4-6] dealing with optical refraction. This approach can also be treated as further development of Fresnel microscopy, used so far for imaging of in-situ magnetization process in magnetic materials studied by TEM. Figs. 1-3 show some examples of what kind information can be retrieved from the conventional Fresnel images using the new approach. Most of these results can be compared with electron-holographic data. Using this approach we can shed more light on fine details of in-situ magnetization process in magnetic materials and films studied by TEM. As an example, Fig. 4 illustrates the evolution of domain configurations in 25-nm thick Co-elements patterned on silicon nitride membrane as function of applied field, ranging from +70 to -70 Oe. The Lorentz phase microscopy allows better understanding the role of magnetization ripple (41 Oe) in nucleation of reverse domains (28 Oe), or vortex formation ( -4.4 Oe) followed by the reverse domains expansion and final annihilation of domain walls (41/-41 Oe) at the sample edges. It is believed that due to technical simplicity the Lorentz phase microscopy will find more applications in the nearest future.

In Situ Lorentz Microscopy and Electron Holography in Magnetic Nanostructures

Author : Luis Alfredo Rodríguez González
Publisher :
ISBN 13 : 9788416272884
Total Pages : 228 pages
Book Rating : 4.2/5 (728 download)

DOWNLOAD NOW!

Book Synopsis In Situ Lorentz Microscopy and Electron Holography in Magnetic Nanostructures by : Luis Alfredo Rodríguez González

Download or read book In Situ Lorentz Microscopy and Electron Holography in Magnetic Nanostructures written by Luis Alfredo Rodríguez González and published by . This book was released on 2014 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, we have developed quantitative and qualitative studies of the magnetic states of different magnetic nanostructures by in situ Lorentz Microscopy (LM) and Electron Holography (EH) experiments under application of magnetic field or working at low temperature (100 K), on three different magnetic nanostructures: L-shape Co and Co50Fe50 nanowires, Co antidot arrays and strained La2/3Ca1/3MnO3. DW manipulation experiments by magnetic field allowed characterize process such as DW nucleation, propagation, pinning and depinning in the nanowires. By in situ LM, remanent magnetic states and reversal magnetization process in high-density antidot arrays were studied. Finally, the effect of the substrate-induced strain in LCMO thin film were studied by EH at 100 K. We found that such strain effect produce a magnetic phase separation and/or variation in the magnetocrystalline anisotropy.

Magnetic Imaging and Its Applications to Materials

Author :
Publisher : Academic Press
ISBN 13 : 0080531377
Total Pages : 329 pages
Book Rating : 4.0/5 (85 download)

DOWNLOAD NOW!

Book Synopsis Magnetic Imaging and Its Applications to Materials by :

Download or read book Magnetic Imaging and Its Applications to Materials written by and published by Academic Press. This book was released on 2000-10-19 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 36 provides an extensive introduction to magnetic imaging,including theory and practice, utilizing a wide range of magnetic sensitive imaging methods. It also illustrates the applications of these modern experimental techniques together with imaging calculations to today's advanced magnetic materials. This book is geared towards the upper-level undergraduate students and entry-level graduate students majoring in physics or materials science who are interested in magnetic structure and magnetic imaging. Researchers involved in studying magnetic materials should also find the book useful as it consistently summarizes the recent progress in this field. The book covers today's most advanced magnetic imaging techniques, comprehensively written with about 150 figures and more than 300 references to the scientific literature

Handbook of Magnetic Materials

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

DOWNLOAD NOW!

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

纳米技术中的显微学手册

Author :
Publisher : 清华大学出版社有限公司
ISBN 13 : 9787302097587
Total Pages : 440 pages
Book Rating : 4.0/5 (975 download)

DOWNLOAD NOW!

Book Synopsis 纳米技术中的显微学手册 by :

Download or read book 纳米技术中的显微学手册 written by and published by 清华大学出版社有限公司. This book was released on 2005 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: 本书叙述了电子显微学的内容,共有12个专题。力图使读者对所叙述的方法有一个概念上的理解,而不是只停留在对理论的堆砌上。

Advances in Imaging and Electron Physics

Author :
Publisher : Academic Press
ISBN 13 : 0128155426
Total Pages : 340 pages
Book Rating : 4.1/5 (281 download)

DOWNLOAD NOW!

Book Synopsis Advances in Imaging and Electron Physics by :

Download or read book Advances in Imaging and Electron Physics written by and published by Academic Press. This book was released on 2018-06-15 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Imaging and Electron Physics, Volume 206, merges two long-running serials, Advances in Electronics and Electron Physics and Advances in Optical and Electron Microscopy. The series features extended articles on the physics of electron devices (especially semiconductor devices), particle optics at high and low energies, microlithography, image science, digital image processing, electromagnetic wave propagation, electron microscopy, and the computing methods used in all these domains. Contains contributions from leading authorities on the subject matter Informs and updates on all the latest developments in the field of imaging and electron physics Provides practitioners interested in microscopy, optics, image processing, mathematical morphology, electromagnetic fields, electrons and ion emission with a valuable resource Features extended articles on the physics of electron devices (especially semiconductor devices), particle optics at high and low energies, microlithography, image science and digital image processing

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)

DOWNLOAD NOW!

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.

Advances in Imaging and Electron Physics

Author : Peter W. Hawkes
Publisher : Academic Press
ISBN 13 : 0123859816
Total Pages : 273 pages
Book Rating : 4.1/5 (238 download)

DOWNLOAD NOW!

Book Synopsis Advances in Imaging and Electron Physics by : Peter W. Hawkes

Download or read book Advances in Imaging and Electron Physics written by Peter W. Hawkes and published by Academic Press. This book was released on 2011-11-11 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Imaging and Electron Physics merges two long-running serials--Advances in Electronics and Electron Physics and Advances in Optical and Electron Microscopy. This series features extended articles on the physics of electron devices (especially semiconductor devices), particle optics at high and low energies, microlithography, image science and digital image processing, electromagnetic wave propagation, electron microscopy, and the computing methods used in all these domains. Contributions from leading international scholars and industry experts Discusses hot topic areas and presents current and future research trends Invaluable reference and guide for physicists, engineers and mathematicians

Proceedings: Microscopy and Microanalysis 2002: Volume 8

Author : Microscopy Society of America
Publisher : Cambridge University Press
ISBN 13 : 9780521824057
Total Pages : 556 pages
Book Rating : 4.8/5 (24 download)

DOWNLOAD NOW!

Book Synopsis Proceedings: Microscopy and Microanalysis 2002: Volume 8 by : Microscopy Society of America

Download or read book Proceedings: Microscopy and Microanalysis 2002: Volume 8 written by Microscopy Society of America and published by Cambridge University Press. This book was released on 2002-12-16 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Proceedings volume contains extended abstracts of all the papers presented by microscopists in both the materials and life sciences at the Microscopy and Microanalysis 2002 meeting held in Québec City, Québec, Canada on August 4-9, 2002. The Proceedings consists of both a printed volume containing the extended abstracts of all invited papers as well as a searchable CD-ROM containing the extended abstracts of all papers presented at the meeting --whether invited or submitted, platform or poster.

Handbook of Magnetic Materials

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

DOWNLOAD NOW!

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

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)

DOWNLOAD NOW!

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

Advanced Magnetic Nanostructures

Author : D.J. Sellmyer
Publisher : Springer Science & Business Media
ISBN 13 : 0387233164
Total Pages : 514 pages
Book Rating : 4.3/5 (872 download)

DOWNLOAD NOW!

Book Synopsis Advanced Magnetic Nanostructures by : D.J. Sellmyer

Download or read book Advanced Magnetic Nanostructures written by D.J. Sellmyer and published by Springer Science & Business Media. This book was released on 2006-07-02 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.