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Author: Antonio Badía-Majós Publisher: ISBN: 9780750327114 Category : Superconductivity Languages : en Pages : 0
Book Description
A number of macroscopic manifestations of superconducting phenomena (such as zero electrical resistance, the expulsion of magnetic fields and the Josephson effect) have resulted in a proliferation of applications in engineering and electronics. This book takes a practical, pedagogical approach to understanding the electromagnetic properties of superconducting materials. The reader is provided with a set of ready-to-use interactive tools to engage with topics such as vanishing resistivity, magnetic flux expulsion, flux pinning, critical currents, flux quantization and more. Aimed at high level undergraduate and graduate physicists and engineers, this book is ideal for early researchers studying macroscopic superconductivity.
Author: Antonio Badía-Majós Publisher: ISBN: 9780750327114 Category : Superconductivity Languages : en Pages : 0
Book Description
A number of macroscopic manifestations of superconducting phenomena (such as zero electrical resistance, the expulsion of magnetic fields and the Josephson effect) have resulted in a proliferation of applications in engineering and electronics. This book takes a practical, pedagogical approach to understanding the electromagnetic properties of superconducting materials. The reader is provided with a set of ready-to-use interactive tools to engage with topics such as vanishing resistivity, magnetic flux expulsion, flux pinning, critical currents, flux quantization and more. Aimed at high level undergraduate and graduate physicists and engineers, this book is ideal for early researchers studying macroscopic superconductivity.
Author: C Giovannella Publisher: World Scientific ISBN: 9814548898 Category : Languages : en Pages : 410
Book Description
This volume is a review on the recent progresses done in the understanding of the physics of the superconducting arrays. It consists of five sessions:All the topical contributions go well beyond those characteristics of the condensed matter physics and offer links to the domains of the nonlinear science, complex systems and statistical mechanics.
Author: V.R. Romanovskii Publisher: CRC Press ISBN: 1351010158 Category : Science Languages : en Pages : 416
Book Description
Allows detailed understanding of the superconductivity phenomenon. Presents fundamental models describing interconnected electrodynamics and thermal phenomena in LTS and HTS superconductors with ideal and real voltage-current characteristics. Calculates boundary of superconducting state instability with respect to any disturbance according to formulated total mechanism of superconductivity distraction. Investigates the irreversible propagation of normal zone in current-carrying elements of superconducting magnets during flux creep. Describes quench phenomena in LTS and HTS superconductors.
Author: A. O. Caldeira Publisher: Cambridge University Press ISBN: 1139867024 Category : Science Languages : en Pages : 299
Book Description
Reviewing macroscopic quantum phenomena and quantum dissipation, from the phenomenology of magnetism and superconductivity to the presentation of alternative models for quantum dissipation, this book develops the basic material necessary to understand the quantum dynamics of macroscopic variables. Macroscopic quantum phenomena are presented through several examples in magnetism and superconductivity, developed from general phenomenological approaches to each area. Dissipation naturally plays an important role in these phenomena, and therefore semi-empirical models for quantum dissipation are introduced and applied to the study of a few important quantum mechanical effects. The book also discusses the relevance of macroscopic quantum phenomena to the control of meso- or nanoscopic devices, particularly those with potential applications in quantum computation or quantum information. It is ideal for graduate students and researchers.
Author: Michel Cyrot Publisher: World Scientific Publishing Company ISBN: 9813103698 Category : Science Languages : en Pages : 263
Book Description
What sets this book apart from others on the introduction to super-conductivity and high-Tc materials is its simple and pragmatic approach. The authors describe all relevant superconducting phenomena and rely on the macroscopic Ginzburg-Landau theory to derive the most important results. Examples are chosen from selected conventional superconductors like NbTi and compared to those of high-Tc materials. The text should be of interest to students and researchers in all branches of science and engineering, with the possible exception of theoretical physicists, who may require a more mathematical approach.
Author: Herbert Simanjuntak Publisher: Nova Science Publishers ISBN: 9781536161335 Category : Science Languages : en Pages : 166
Book Description
Although the discussion is general, this book focuses on the problem of macroscopic quantum phenomena using systems of spintronics. The spintronics considered are ferromagnetic and antiferromagnetic spintronics. To represent the macroscopic quantum phenomena in spintronics, transitions from one state to another of the magnetization of ferromagnetic spintronics are considered, and of the Néel vector of antiferromagnetic spintronics. The authors have studied transitions from a metastable state to a more stable one, as well as quantum coherence between two degenerate stable states. Quantum and classical rates of transitions are presented as functions of temperature, magnetic field and the spin-polarized current flowing through the spintronics. With this method, one can immediately observe the effect of the spin-polarized current on the transitions of the magnetization and the Néel vector when comparing the results to those of the earlier ones on magnetic systems that did not have spin-polarized current. Specifically, while dissipations in magnetic system are intrinsic, the book shows how the total dissipation in spintronics can be controlled and eliminated by varying the spin-polarized current appropriately that depends on the temperature. The study of transitions from a metastable state to a more stable one in ferromagnetic spintronics shows that the rate of transitions of the magnetization at low temperatures is low and vanishes at zero temperature, so that the magnetization is relatively more stable than that in ferromagnetic materials without existence of spin-polarized currents. In the case of antiferromagnetic spintronics, the behavior and characteristics of transitions of the Néel vector is in contrast to those of ferromagnetic spintronics, where the low-temperature rate of transitions in antiferromagnetic spintronics varies exponentially small in temperature, and is finite and non-vanishing at zero temperature. In addition to the theoretical aspects, the book also discusses experimental and technological aspects that one may obtain. Measurements of the rate of transitions can be used to provide an independent method to determine certain parameters being involved, such as the anisotropy parameter Kc of tetragonal crystals, which is an important parameter but usually difficult to obtain. Eliminating dissipation in ferromagnetic and antiferromagnetic spintronics would be desired so as not to have unnecessary loss of energy. Low rate of transitions corresponds to the initial state that is relatively stable. Technologically, the stability of the states of the magnetization and Néel vector in spintronics are important, for example, for memory storage.
Author: Fred Sharifi Publisher: ISBN: Category : Languages : en Pages : 206
Book Description
This thesis is a study of escape from metastable wells in one and two dimensional potentials of superconducting devices. We have measured escape rates due to both thermal activation over the barrier and macroscopic quantum tunneling through the barrier. The measurements were performed for a variety of device parameters, corresponding to different shapes of the potential barrier. We find strong evidence for macroscopic quantum tunneling in both one and two dimensional systems with an escape rate that is very sensitive to the dissipation present in the system. Surprisingly, we have also found a discrepancy between our results and the predictions of Kramers' thermal activation model in certain types of potentials.
Author: Antonio Badía-Majós
Author: Antonio Badía-Majós
Author: C Giovannella
Author: V.R. Romanovskii
Author: R.D. Parks
Author: A. O. Caldeira
Author: D. Rogovin
Author: Michel Cyrot
Author: Daniel N. Rogovin
Author: Herbert Simanjuntak
Author: Fred Sharifi