Thermal stability of magnetic states in submicron magnetic islands
https://doi.org/10.17586/22208054201785572578
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 twodimensional energy surfaces. An analytical expression is derived for the preexponential 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.
Supporting agencies: This work was supported by the Icelandic Research Fund, the Academy of Finland (grant 278260) and the Government of the Russian Federation (grant 074U01) and by grant 161110330 of Russian Science Foundation.
About the Authors
S. Y. Liashko
ITMO University; ScienceScience Institute and Faculty of Physical Sciences, University of Iceland
Russian Federation
Russian Federation
Kronverkskiy, 49, St. Petersburg, 197101
107 Reykjav´ık
I. S. Lobanov
ITMO University, Kronverkskiy
Russian Federation
Russian Federation
49, St. Petersburg, 197101
V. M. Uzdin
ITMO University; St. Petersburg State University
Russian Federation
Russian Federation
Kronverkskiy, 49, St. Petersburg, 197101
St. Petersburg, 198504
H. J´onsson
Science Institute and Faculty of Physical Sciences, University of Iceland; Center for Nonlinear Studies
Russian Federation
Russian Federation
107 Reykjav´ık
Los Alamos, NM 87545
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Review
For citations:
Liashko S.Y., Lobanov I.S., Uzdin V.M., J´onsson H. Thermal stability of magnetic states in submicron magnetic islands. Nanosystems: Physics, Chemistry, Mathematics. 2017;8(5):572–578. https://doi.org/10.17586/22208054201785572578
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