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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
Аннотация:
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.
Ключевые слова:
pre-exponential factor, magnetic islands, activation energy, rate theory, spin ice.
Поступила в редакцию: 19.09.2017 Исправленный вариант: 14.10.2017
Образец цитирования:
S. Y. Liashko, I. S. Lobanov, V. M. Uzdin, H. Jónsson, “Thermal stability of magnetic states in submicron magnetic islands”, Наносистемы: физика, химия, математика, 8:5 (2017), 572–578
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/nano76 https://www.mathnet.ru/rus/nano/v8/i5/p572
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Страница аннотации: | 74 | PDF полного текста: | 35 |
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