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Nanosystems: Physics, Chemistry, Mathematics, 2017, Volume 8, Issue 5, Pages 572–578
DOI: https://doi.org/10.17586/2220-8054-2017-8-5-572-578 (Mi nano76) 		 
PHYSICS

Thermal stability of magnetic states in submicron magnetic islands

S. Y. Liashkoab, I. S. Lobanova, V. M. Uzdinac, H. Jónssonbd

a ITMO University, Kronverkskiy, 49, St. Petersburg, 197101, Russia Kronverkskiy, 49, St. Petersburg, 197101, Russia
b Science Institute and Faculty of Physical Sciences, University of Iceland 107 Reykjavík, Iceland
c St. Petersburg State University, St. Petersburg, 198504, Russia
d Center for Nonlinear Studies, Los Alamos, NM 87545, USA
Full-text PDF (489 kB)
DOI: https://doi.org/10.17586/2220-8054-2017-8-5-572-578
Abstract: The lifetime of magnetic states in single domain micromagnetic islands is calculated within the harmonic approximation to transition state theory. Stable magnetic states, minimum energy paths between them and first order saddle points determining the activation energy are analyzed and visualized on two-dimensional energy surfaces. An analytical expression is derived for the pre-exponential factor in the Arrhenius rate expression for the reversal of the magnetic moment when the external field is directed either along the anisotropy axis or perpendicular to it.
Keywords: pre-exponential factor, magnetic islands, activation energy, rate theory, spin ice.
Funding agency Grant number
Icelandic Research Fund 278260
Ministry of Education and Science of the Russian Federation 074-U01
Russian Science Foundation 16-11-10330
This work was supported by the Icelandic Research Fund, the Academy of Finland (grant 278260) and the Government of the Russian Federation (grant 074-U01) and by grant 16-11-10330 of Russian Science Foundation.
Received: 19.09.2017
Revised: 14.10.2017
Bibliographic databases:
Document Type: Article
PACS: 75.75.-c, 75.75.Jn, 75.60.Jk
Language: English
Citation: S. Y. Liashko, I. S. Lobanov, V. M. Uzdin, H. Jónsson, “Thermal stability of magnetic states in submicron magnetic islands”, Nanosystems: Physics, Chemistry, Mathematics, 8:5 (2017), 572–578
Citation in format AMSBIB
\Bibitem{LiaLobUzd17}
\by S.~Y.~Liashko, I.~S.~Lobanov, V.~M.~Uzdin, H.~J\'onsson
\paper Thermal stability of magnetic states in submicron magnetic islands
\jour Nanosystems: Physics, Chemistry, Mathematics
\yr 2017
\vol 8
\issue 5
\pages 572--578
\mathnet{http://mi.mathnet.ru/nano76}
\crossref{https://doi.org/10.17586/2220-8054-2017-8-5-572-578}
\isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=000419787400004}
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