Nanomagnets As Dynamical Systems
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Nanomagnets as Dynamical Systems
Author: Supriyo Bandyopadhyay
language: en
Publisher: Springer Nature
Release Date: 2024-11-09
This contributed volume provides a comprehensive overview of contemporary advancements in the field of nanomagnetism and spintronics. It covers a diverse range of topics, including the static and dynamic responses of designer nanomagnets, spin wave dynamics in ultra-thin ferromagnetic films, voltage-controlled magnetic anisotropy, magneto-elastic control of nanomagnet dynamics, mutual synchronization in spintronic oscillators, magnetic droplet solitons, and the applications of voltage-controlled magnetic anisotropy in spintronic devices. Each chapter discusses specific aspects of these subjects, exploring theoretical models, experimental methods, applications, and future directions, making it an essential resource for researchers, students, and professionals in the fields of physics, materials science, electrical engineering and nanonscience.
Nanoscale Computing
Author: Santhosh Sivasubramani
language: en
Publisher: John Wiley & Sons
Release Date: 2025-01-22
Understand the future of computing with this accessible, wide-ranging introduction to a promising field Miniaturization and the emergence of nanotechnology have together constituted the most revolutionary development in recent decades of computing research and innovation. Nanomagnetic computing and logic have allowed engineers and programmers to move beyond the Complementary Metal-Oxide-Semiconductor (CMOS) and their associated methods into a new world of cutting-edge computing technology. Nanoscale Computing offers the first-ever single-authored textbook on this vital subject, introducing the fundamentals of nanoscale computing, their suitability to the traditional limitations of CMOS computing, and their growing number of applications. The result is a key text for students, professionals, and researchers alike. Nanoscale Computing readers will also find: An emphasis on practical applications, both current and future Detailed discussion of topics including nanomagnetic logic, edge computing, and more End of chapter quizzes and additional tutorials to facilitate learning Nanoscale Computing is ideal for researchers and technology experts, as well as graduate and undergraduate students working in computer science, nanotechnology, magnetics, electronics, semiconductors, electron devices, circuits/systems, and multi-interdisciplinary related fields.
Thermal Fluctuations And Relaxation Processes In Nanomagnets
Presenting in a coherent and accessible fashion current results in nanomagnetism, this book constitutes a comprehensive, rigorous and readable account, from first principles of the classical and quantum theories underlying the dynamics of magnetic nanoparticles subject to thermal fluctuations.Starting with the Larmor-like equation for a giant spin, both the stochastic (Langevin) equation of motion of the magnetization and the associated evolution (Fokker-Planck) equation for the distribution function of the magnetization orientations of ferromagnetic nanoparticles (classical spins) in a heat bath are developed along with their solution (using angular momentum theory) for arbitrary magnetocrystalline-Zeeman energy. Thus, observables such as the magnetization reversal time, relaxation functions, dynamic susceptibilities, etc. are calculated and compared with the predictions of classical escape rate theory including in the most general case spin-torque-transfer. Regarding quantum effects, which are based on the reduced spin density matrix evolution equation in Hilbert space as is described at length, they are comprehensively treated via the Wigner-Stratonovich formulation of the quantum mechanics of spins via their orientational quasi-probability distributions on a classically meaningful representation space. Here, as suggested by the relevant Weyl symbols, the latter is the configuration space of the polar angles. Hence, one is led, by mapping the reduced density matrix equation onto that space, to a master equation for the quasi-probability evolution akin to the Fokker-Planck equation which may be solved in a similar way. Thus, one may study in a classical-like manner the evolution of observables with spin number ranging from an elementary spin to molecular clusters to the classical limit, viz. a nanoparticle. The entire discussion hinges on the one-to-one correspondence between polarization operators in Hilbert space and the spherical harmonics allied to concepts of spin coherent states long familiar in quantum optics.Catering for the reader with only a passing knowledge of statistical and quantum mechanics, the book serves as an introductory text on a complicated subject where the literature is remarkably sparse.