Magnetization dynamics

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  • Putting the quantum into magnetism might, at first sight, seem like stating the obvious; the exchange interactions leading to collective magnetic behavior are, after all, a pure quantum effect. Yet, for many phenomena in magnetism this underlying quantum nature may be safely ignored at least on the qualitative level. The investigation of magnetic systems where quantum effects play a dominant role and have to be accounted for in detail has, over the last decades, evolved to be a field of very active research....

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  • We prove the existence of dynamical delocalization for random Landau Hamiltonians near each Landau level. Since typically there is dynamical localization at the edges of each disordered-broadened Landau band, this implies the existence of at least one dynamical mobility edge at each Landau band, namely a boundary point between the localization and delocalization regimes, which we prove to converge to the corresponding Landau level as either the magnetic field goes to infinity or the disorder goes to zero. ...

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  • This cross-disciplinary book documents the key research challenges in the mathematical sciences and physics that could enable the economical development of novel biomedical imaging devices. It is hoped that the infusion of new insights from mathematical scientists and physicists will accelerate progress in imaging.

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  • Abstract The year 2008 marked the one hundredth anniversary of the observational discovery by George Ellery Hale of magnetic field in sunspots (Hale in Astrophys. J. 28:315–343, 1908). This observation, the first to suggest a direct link between the best-known variable features on the Sun and magnetism, started a line of research that has widened considerably over the last 100 years and is continuing today. Knowledge about all aspects of the Sun has increased in a remarkable way over the past few decades....

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  • This chapter presents the following content: Forces and torques in magnetic field systems, energy balance, energy in singly – excited magnetic field systems, determination of magnetic force and torque from energy and coenergy, multiply – excited magnetic field systems, forces and torques in systems with permanent magnets, dynamic equations, analytical techniques.

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  • Cd1-xMnxS nanoparticles (NPs) with size quantum confinement belong to the diluted magnetic semiconductor (DMS) quantum dot (QD) class of materials that has been widely studied in the last few years. The study of quasi-zero-dimensional Diluted Magnetic Semiconductors (DMS), such as Cd1-xMnxS Quantum Dots (QDs), is strongly motivated due to the localization of magnetic ions in the same places as the free-like electron and hole carriers occurring in these nanomaterials [1,2].

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  • The proposed book contains a lot of recent research devoted to numerical simulations of physical and engineering systems. It can be treated as a bridge linking various numerical approaches of two closely inter-related branches of science, i.e. physics and engineering. Since the numerical simulations play a key role in both theoretical and application-oriented research, professional reference books are highly required by pure research scientists, applied mathematicians, engineers as well post- graduate students....

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  • This book provides an overview of the synthesis and characterization of nanocrystals. Nanocrystals, owing to their unique behavior with reduction in size, have been a significant part of the novel materials developed for applications such as biosensors, optics, catalysts to semiconductor devices. Over the years, various synthesis methods are discovered to develop nanostructures with tunable properties such as optical, electronic magnetic and mechanical properties. The chapters in this book cover a broad range of properties of nanocrystals synthesized for various applications....

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  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành y đề tài: Dynamic magnetic resonance of the wrist in psoriatic arthritis reveals imaging patterns similar to those of rheumatoid arthritis...

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  • Based on the results from this year’s survey, it is pretty clear that Building Information Modeling (BIM) is here to stay. Firms reported using BIM technology in 38 percent of their projects in 2012, a slight increase compared to the 35 percent of firms that used BIM in 2011. BIM technology typically uses three-dimensional, real-time, dynamic building modeling software to increase productivity in building design and construction. Construction firms clearly expect demand for BIM to continue growing, with 43 percent reporting they expect use of BIM to increase in 2013.

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  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : Dynamic magnetic resonance imaging in assessing lung function in adolescent idiopathic scoliosis: a pilot study of comparison before and after posterior spinal fusion

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Spin dynamics of an ultra-small nanoscale molecular magnet

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  • This book covers the recent development and progress of the wind energy conversion system. The chapters are contributed by prominent researchers in the field of wind energy and cover grid integration issues, modern control theories applied in wind energy conversion system, and dynamic and transient stability studies.

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  • The permanent-magnet synchronous machine (PMSM) drive has emerged as a top competitor for a full range of motion control applications [1–3]. For example, the PMSM is widely used in machine tools, robotics, actuators, and is being considered in high-power applications such as vehicular propulsion and industrial drives. It is also becoming viable for commercial/residential applications. The PMSM is known for having high efficiency, low torque ripple, superior dynamic performance, and high power density.

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  • In this book, the chapters have been grouped as part according to the following themes: Optical Communications Systems: Part 1, General Concepts; Optical Communications Systems: Part 2, Amplifiers and Networks; Optical Communications Systems: Part 3, Optical Multiplexing and Demultiplexing; Optical Communications Systems: Part 4, Network Traffic. These categorisations of parts are not fully perfect because some of the chapters are mixed i.e., like an inter- disciplinary topic.

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  • Computed tomography (CT) is the mainstay of cancer imaging outside of the central nervous system. Advances in multidetector CT (MDCT) technology have had a profound impact on its diagnostic capabilities. Such techniques as multiphase, single breath-hold imaging, CT angiography (CTA), volume rendering and virtual colonography owe their success to the development of multidetector arrays with continuously moving gantries.

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  • Because of the availability of powerful computational techniques, new modality techniques such as Computer-Aided Tomography (CAT), Magnetic Resonance Imaging (MRI) and others, and because of the new techniques of imaging processing (machine vision), the lives of many patients will be saved, and the quality of all our lives improved. This marriage of powerful computer technology and medical imaging has spawned a new and growing generation of young dynamic doctors who hold PhDs in physics and/or computer science, along with their MDs.

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  • This book consists of a selection of original papers of the leading scientists in the fields of Space and Planetary Physics, Solar and Space Plasma Physics with important contributions to the theory, modeling and experimental techniques of the solar wind exploration.

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  • This special volume is published to mark the Centenary of the founding of the Faraday Society in 1903. It consists of 23 papers re-printed from Faraday journals-the Transactions, General Discussions and Symposia-that have been published over the past 100 years. Each article has been selected by an expert in one of the many scientific fields, bounded by chemistry, physics and biology, which the Faraday Society and its successor the RSC Faraday Division seek to promote. Each paper is accompanied ...

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  • Zhao et al. Nanoscale Research Letters 2011, 6:368 http://www.nanoscalereslett.com/content/6/1/368 NANO EXPRESS Open Access A compact model for magnetic tunnel junction (MTJ) switched by thermally assisted Spin transfer torque (TAS + STT) Weisheng Zhao1,2*, Julien Duval1,2, Jacques-Olivier Klein1,2 and Claude Chappert1,2 Abstract Thermally assisted spin transfer torque [TAS + STT] is a new switching approach for magnetic tunnel junction [MTJ] nanopillars that represents the best trade-off between data reliability, power efficiency and density.

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