Ultrafast Magnetization Dynamics
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Ultrafast Magnetization Dynamics
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Author : Simon Woodford
language : en
Publisher: Forschungszentrum Jülich
Release Date : 2008
Ultrafast Magnetization Dynamics written by Simon Woodford and has been published by Forschungszentrum Jülich this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Science categories.
Ultrafast Magnetism I
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Author : Jean-Yves Bigot
language : en
Publisher: Springer
Release Date : 2014-08-05
Ultrafast Magnetism I written by Jean-Yves Bigot and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-08-05 with Science categories.
This volume on Ultrafast Magnetism is a collection of articles presented at the international “Ultrafast Magnetization Conference” held at the Congress Center in Strasbourg, France, from October 28th to November 1st, 2013. This first conference, which is intended to be held every two years, received a wonderful attendance and gathered scientists from 27 countries in the field of Femtomagnetism, encompassing many theoretical and experimental research subjects related to the spins dynamics in bulk or nanostructured materials. The participants appreciated this unique opportunity for discussing new ideas and debating on various physical interpretations of the reported phenomena. The format of a single session with many oral contributions as well as extensive time for poster presentations allowed researchers to have a detailed overview of the field. Importantly, one could sense that, in addition to studying fundamental magnetic phenomena, ultrafast magnetism has entered in a phase where applied physics and engineering are playing an important role. Several devices are being proposed with exciting R&D perspectives in the near future, in particular for magnetic recording, time resolved magnetic imaging and spin polarized transport, therefore establishing connections between various aspects of modern magnetism. Simultaneously, the diversity of techniques and experimental configurations has flourished during the past years, employing in particular Xrays, visible, infra-red and terahertz radiations. It was also obvious that an important effort is being made for tracking the dynamics of spins and magnetic domains at the nanometer scale, opening the pathway to exciting future developments. The concerted efforts between theoretical and experimental approaches for explaining the dynamical behaviors of angular momentum and energy levels, on different classes of magnetic materials, are worth pointing out. Finally it was unanimously recognized that the quality of the scientific oral and poster presentations contributed to bring the conference to a very high international standard.
Ultrafast Magnetization Dynamics Of Srru03 Thin Films
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Author : Matthew Clemens Langner
language : en
Publisher:
Release Date : 2009
Ultrafast Magnetization Dynamics Of Srru03 Thin Films written by Matthew Clemens Langner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Time Resolved Investigation Of Ultrafast Magnetization Dynamics
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Author : David Weder
language : en
Publisher:
Release Date : 2020
Time Resolved Investigation Of Ultrafast Magnetization Dynamics written by David Weder and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
Ultrafast Magnetization Dynamics For Spin Transfer Torque Based Nano Device
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Author : 張瑞航
language : en
Publisher:
Release Date : 2012
Ultrafast Magnetization Dynamics For Spin Transfer Torque Based Nano Device written by 張瑞航 and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Optically Induced Ultrafast Magnetization Dynamics In Heterostructures
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Author : Martin Stiehl
language : en
Publisher:
Release Date : 2022*
Optically Induced Ultrafast Magnetization Dynamics In Heterostructures written by Martin Stiehl and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022* with categories.
Induced Versus Intrinsic Magnetic Moments In Ultrafast Magnetization Dynamics
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Author : Moritz Hofherr
language : en
Publisher:
Release Date : 2018
Induced Versus Intrinsic Magnetic Moments In Ultrafast Magnetization Dynamics written by Moritz Hofherr and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Investigation Of Light Induced Ultrafast Magnetization Dynamics Using Ab Initio Methods
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Author : Philippe Scheid
language : en
Publisher:
Release Date : 2020
Investigation Of Light Induced Ultrafast Magnetization Dynamics Using Ab Initio Methods written by Philippe Scheid and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
This thesis begins with a review of the current experimental and theoretical state of the art related to the light-induced ultrafast demagnetization and the all-optical helicity-dependent switching. This is followed by an overview of density functional theory, upon which relies most of the work reported thereafter. The first set of results concerns the ab initio study of the effect of a rise in the electronic temperature on the magnetized matter properties, and more specifically Fe, Co, Ni and FePt. We show that the magnetic moment carried by each atom disappears at the so-called Stoner temperature, and that this phenomenon impacts the electronic energy and specific heat, even at low electronic temperature. Then, we show that upon an increase in the electronic temperature, the interatomic Heisenberg exchange, which is responsible for the magnetic ordering, decreases. Using the atomistic Langevin Landau-Lifshitz-Gilbert equation, we demonstrate that this decrease is enough to induce a large reduction of the average magnetization by creating transversal excitations. The second set of results regards the origin of the helicity-dependent light-induced dynamics. While the literature attributes it mainly to the inverse Faraday effect, we argue that another and novel phenomenon, which occurs during the absorption of the light, may be more suited to account for the experimental dynamics. Indeed, using the Fermi golden rule and ground state density functional theory calculations in Fe, Co, Ni and FePt, we show that, as the light is absorbed and electrons are excited, concurrently to the increase of the electronic energy, the spin-state is also changed in presence of spin-orbit coupling. This results in a difference in the value of the atomic magnetic moments, persisting even after the light is gone, as opposed to the inverse Faraday effect. Then, using real-time time-dependent density functional theory, we compute the magnetization dynamics induced by real optical and XUV femtosecond circularly polarized pulses. We show that, in both cases the dynamics is helicity-dependent and that this characteristic is largely amplified in the XUV regime involving the semi-core 3p states. Finally, we compare the relative role of the inverse Faraday effect and the magnetization induced during the absorption of the light and show that the latter plays a prominent role, especially after the light has gone, and in the XUV regime.
Ultrafast Magnetization Dynamics In Ferromagnetic Thin Films And Heterostructures
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Author : Yongfeng Guan
language : en
Publisher:
Release Date : 2008
Ultrafast Magnetization Dynamics In Ferromagnetic Thin Films And Heterostructures written by Yongfeng Guan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Ultrafast Magnetization Dynamics Induced By Femtosecond Laser Pulses
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Author : Alexander Weber
language : en
Publisher:
Release Date : 2004
Ultrafast Magnetization Dynamics Induced By Femtosecond Laser Pulses written by Alexander Weber and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.