Growth And Characterization Of Skyrmion Hosting Magnetic Thin Films
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| Author | : Brian J. Youngblood |
| Publisher | : |
| Total Pages | : 107 |
| Release | : 2016 |
| Genre | : |
| ISBN | : 9781339528854 |
Magnetic skyrmions are particle-like knots of magnetization which are both highly stable under the proper conditions and at the same time very easy to move and rotate. These properties make them very promising as a basis for future spin electronic information storage and manipulation. At the same time, these structures exhibit interesting fundamental physics including emergent mass and electrodynamics and phase transitions including a crystalline state as well as being low-dimensional analogues of a model of low-energy sub-atomic particles. Accessibility to studying these objects is hampered by the fact that most skyrmion-hosting materials have to be grown either as single crystals or by molecular beam epitaxy (MBE). Also, predictive studies are currently mostly restricted to full numerical simulations because of the intractability of the equation describing skyrmion structure and a dearth of analytical approximations.In this dissertation, I present work on the sputter deposition of the skyrmion hosting chiral magnetic material MnSi. MnSi was the first material observed to exhibit a skyrmion state but it has not been made by sputtering until now. I demonstrate by x-ray diffractometry and electrical measurements that the sputter-deposited MnSi exhibits properties similar to those of MBE-grown thin films including hosting skyrmions. This will hopefully improve the accessibility of experimental studies of MnSi and skyrmions. I also present an approximation for skyrmion spatial profiles which can predict skyrmion structure in a physically interesting range of material parameters and external magnetic fields. Using this structural approximation it should be possible to predict skyrmion stability and behavior under different conditions more rapidly than is possible with numerical simulations.
| Author | : Binbin Wang (Ph. D. in materials science) |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2022 |
| Genre | : Electron microscopy |
| ISBN | : |
Novel spintronic devices based on magnetic skyrmions, a non-volatile nanoscale topological excitation, are attractive as a new paradigm for high data processing speeds and low operating power, addressing the fundamental scaling restrictions in conventional electronics. Identifying materials capable of hosting small skyrmions and being able to image and manipulate skyrmions in these materials is essential as a path to design and develop such devices. Meanwhile, revealing and understanding the mechanisms underlying emergent spintronic phenomenon in these materials will further facilitate the development of next-generation spintronic devices with application in information storage and processing. The focus of this study is to explore and apply different magnetic characterization techniques in the transmission electron microscope (TEM) to investigate the creation, annihilation and manipulation of magnetic skyrmions in potential spintronic materials and devices. The first phase of this research was committed to the establishment of imaging techniques using Lorentz TEM and STEM. In the second phase, these methods have been employed to explore promising skyrmion hosting materials, including single crystal and novel thin films with broken bulk inversion, oxide interfaces with broken surface/mirror inversion, and centrosymmetric materials with geometric confinement. The study’s last step entails the design and investigation of skyrmion dynamics in prototype devices using in-situ sample holders.
| Author | : Dipti Ranjan Sahu |
| Publisher | : BoD – Books on Demand |
| Total Pages | : 150 |
| Release | : 2021-07-28 |
| Genre | : Science |
| ISBN | : 1839692529 |
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.
| Author | : Fatma Sarf |
| Publisher | : BoD – Books on Demand |
| Total Pages | : 178 |
| Release | : 2024-01-17 |
| Genre | : Technology & Engineering |
| ISBN | : 1837691355 |
This book focuses on the growth of nanomaterials as thin films. It covers the recent development of thin films using different techniques, such as electrodeposition. It also discusses the widespread use of electrochemical and magnetic applications. This book brings together multidisciplinary chapters written by leading specialists in the field.
| Author | : Andrew Teck Ann Wee |
| Publisher | : |
| Total Pages | : 111 |
| Release | : 1997 |
| Genre | : Thin films |
| ISBN | : |
| Author | : Mark Craig Dowling |
| Publisher | : |
| Total Pages | : |
| Release | : 1997 |
| Genre | : |
| ISBN | : |
| Author | : Lawrence H Bennett |
| Publisher | : World Scientific |
| Total Pages | : 397 |
| Release | : 1994-12-16 |
| Genre | : Technology & Engineering |
| ISBN | : 9814571067 |
This book focuses on an increasingly important area of materials science and technology, namely, the fabrication and properties of artificial materials where slabs of magnetized materials are sandwiched between slabs of nonmagnetized materials. It includes reviews by experts on the theory and descriptions of the various experimental techniques such as those using nuclear or electron spin probes, as well as optical, X-ray or neutron probes. It also reviews potential applications such as the giant magnetoresistance, and one specialized preparation technique, the electrodeposition. The various chapters are tutorial in nature, making the subject accessible to nonspecialists, as well as useful to researchers in the field.
| Author | : Tomoyuki Yokouchi |
| Publisher | : Springer |
| Total Pages | : 88 |
| Release | : 2019-08-14 |
| Genre | : Computers |
| ISBN | : 9813293853 |
This book provides extensive and novel insights into transport phenomena in MnSi, paving the way for applying the topology and chirality of spin textures to the development of spintronics devices. In particular, it describes in detail the key measurements, e.g. magnetoresistance and nonlinear electronic transport, and multiple material-fabrication techniques based on molecular beam epitaxy, ion-beam microfabrication and micromagnetic simulation. The book also reviews key aspects of B20-type MnSi chiral magnets, which host magnetic skyrmions, nanoscale objects formed by helical spatial spin structures. Readers are then introduced to cutting-edge findings on the material. Furthermore, by reviewing the author’s successful experiments, the book provides readers with a valuable update on the latest achievements in the measurement and fabrication of magnetic materials in spintronics.
| Author | : Giovanni Finocchio |
| Publisher | : Woodhead Publishing |
| Total Pages | : 472 |
| Release | : 2021-06-03 |
| Genre | : Technology & Engineering |
| ISBN | : 012820933X |
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
| Author | : Jiadong Zang |
| Publisher | : Springer |
| Total Pages | : 426 |
| Release | : 2018-09-24 |
| Genre | : Science |
| ISBN | : 3319973347 |
This book presents both experimental and theoretical aspects of topology in magnetism. It first discusses how the topology in real space is relevant for a variety of magnetic spin structures, including domain walls, vortices, skyrmions, and dynamic excitations, and then focuses on the phenomena that are driven by distinct topology in reciprocal momentum space, such as anomalous and spin Hall effects, topological insulators, and Weyl semimetals. Lastly, it examines how topology influences dynamic phenomena and excitations (such as spin waves, magnons, localized dynamic solitons, and Majorana fermions). The book also shows how these developments promise to lead the transformative revolution of information technology.
