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Title | Switching properties of ferromagnetic nanoparticles driven by a circularly polarized magnetic field |
Authors |
Lyutyy, Taras Vladimirovich
Polyakov, Alexandr Yurievich Rot-Serov, Alexandr Vladimirovich Binns, C. |
ORCID | |
Keywords |
Magnetic fine particles Circularly polarized magnetic field Magnetization switching |
Type | Article |
Date of Issue | 2009 |
URI | http://essuir.sumdu.edu.ua/handle/123456789/2614 |
Publisher | |
License | |
Citation | |
Abstract |
We present a comprehensive study of the magnetization switching of a uniaxial nanoparticle
driven by a circularly polarized magnetic field rotated in the plane perpendicular to the easy
axis. The conditions for the existence of the uniform and non-uniform precessions of the
nanoparticle magnetic moment are derived. In addition, the differences between switchings via
uniform and non-uniform precession are determined, and the essential role of field polarization
is demonstrated. The dependence of the switching time on the field amplitude and frequency are
calculated numerically. We show that a permanent magnetic field can reduce the amplitude and
frequency of the switching rotating field, and that the combined action of these field is
characterized by an extremely strong dependence of the switching time on the field parameters.
We also demonstrate that the transition process caused by an external magnetic field pulse can
decrease the switching amplitude in comparison with the value predicted from analysis of the
stability criterion. We discuss the advantages of switching the magnetization by means of the
action of a rotating field over the magnetization switching using a steady field applied
perpendicular to the easy axis.
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2614 |
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File | Size | Format | Downloads |
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JPhysCondMat2009_21_396002.pdf | 732,3 kB | Adobe PDF | 402765651 |
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