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Atomistic Spin DynamicsFoundations and Applications$
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Olle Eriksson, Anders Bergman, Lars Bergqvist, and Johan Hellsvik

Print publication date: 2017

Print ISBN-13: 9780198788669

Published to Oxford Scholarship Online: May 2017

DOI: 10.1093/oso/9780198788669.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (www.oxfordscholarship.com). (c) Copyright Oxford University Press, 2019. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 17 October 2019

Ultrafast Switching Dynamics

Ultrafast Switching Dynamics

Chapter:
(p.198) 11 Ultrafast Switching Dynamics
Source:
Atomistic Spin Dynamics
Author(s):

Olle Eriksson

Anders Bergman

Lars Bergqvist

Johan Hellsvik

Publisher:
Oxford University Press
DOI:10.1093/oso/9780198788669.003.0011

The time-integrated amount of data and stored information, is doubled roughly every eighteen months, and since the majority of the worlds information is stored in magnetic media, the possibility to write and retrieve information in a magnetic material at ever greater speed and with lower energy consumption, has obvious benefits for our society. Hence the seemingly simple switching of a magnetic unit, a bit, is a crucial process which defines how efficiently information can be stored and retrieved from a magnetic memory. Of particular interest here are the concepts of ultrafast magnetism and all-optical control of magnetism which have in recent decades become the basis for an intense research field. The motivation is natural; the mechanisms behind these phenomena are far from trivial and the technological implications are huge.

Keywords:   Ultrafast switching dynamics, demagnetization, reversal, all-optical control, energy barrier, domain, domain wall, three-temperature model

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