Parametric amplification of reversible transverse susceptibility in single domain magnetic nanoparticles

We propose, model, and experimentally demonstrate the enhancement of reversible transverse susceptibility in single domain magnetic nanoparticles through the principle of parametric amplification. It has previously been demonstrated that properly oriented anisotropic single domain magnetic nanoparti...

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Main Authors: Hatem ElBidweihy, Richard D. Smith, Mladen Barbic
Format: Article
Language:English
Published: AIP Publishing LLC 2019-04-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.5079980
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author Hatem ElBidweihy
Richard D. Smith
Mladen Barbic
author_facet Hatem ElBidweihy
Richard D. Smith
Mladen Barbic
author_sort Hatem ElBidweihy
collection DOAJ
description We propose, model, and experimentally demonstrate the enhancement of reversible transverse susceptibility in single domain magnetic nanoparticles through the principle of parametric amplification. It has previously been demonstrated that properly oriented anisotropic single domain magnetic nanoparticles have an appreciable peak in transverse susceptibility at the particle anisotropy field. Here we show theoretically and experimentally that an additional parametric AC magnetic field applied at a proper phase and at twice the frequency (2f) of the transverse field further enhances transverse susceptibility peaks through the process of parametric amplification. We model this effect numerically and describe it through the energy formalism of the single magnetic domain Stoner-Wohlfarth model. The proper phase relationships of the transverse and parametric fields to obtain either parametric amplification or attenuation of the transverse susceptibility signals are also described. We experimentally demonstrate such parametric tuning of transverse susceptibility in single domain magnetic nanoparticles of a commercial audio tape in a prototypical inductive transverse susceptibility set-up.
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spelling doaj.art-56c9d56d28dc49939e3f968d21f0638e2022-12-22T00:50:01ZengAIP Publishing LLCAIP Advances2158-32262019-04-0194045031045031-710.1063/1.5079980103992ADVParametric amplification of reversible transverse susceptibility in single domain magnetic nanoparticlesHatem ElBidweihy0Richard D. Smith1Mladen Barbic2Electrical and Computer Engineering Department, United States Naval Academy, Annapolis, Maryland 21402, USAHoward Hughes Medical Institute, Janelia Research Campus, Applied Physics and Instrumentation Group, Ashburn, Virginia 20147, USAHoward Hughes Medical Institute, Janelia Research Campus, Applied Physics and Instrumentation Group, Ashburn, Virginia 20147, USAWe propose, model, and experimentally demonstrate the enhancement of reversible transverse susceptibility in single domain magnetic nanoparticles through the principle of parametric amplification. It has previously been demonstrated that properly oriented anisotropic single domain magnetic nanoparticles have an appreciable peak in transverse susceptibility at the particle anisotropy field. Here we show theoretically and experimentally that an additional parametric AC magnetic field applied at a proper phase and at twice the frequency (2f) of the transverse field further enhances transverse susceptibility peaks through the process of parametric amplification. We model this effect numerically and describe it through the energy formalism of the single magnetic domain Stoner-Wohlfarth model. The proper phase relationships of the transverse and parametric fields to obtain either parametric amplification or attenuation of the transverse susceptibility signals are also described. We experimentally demonstrate such parametric tuning of transverse susceptibility in single domain magnetic nanoparticles of a commercial audio tape in a prototypical inductive transverse susceptibility set-up.http://dx.doi.org/10.1063/1.5079980
spellingShingle Hatem ElBidweihy
Richard D. Smith
Mladen Barbic
Parametric amplification of reversible transverse susceptibility in single domain magnetic nanoparticles
AIP Advances
title Parametric amplification of reversible transverse susceptibility in single domain magnetic nanoparticles
title_full Parametric amplification of reversible transverse susceptibility in single domain magnetic nanoparticles
title_fullStr Parametric amplification of reversible transverse susceptibility in single domain magnetic nanoparticles
title_full_unstemmed Parametric amplification of reversible transverse susceptibility in single domain magnetic nanoparticles
title_short Parametric amplification of reversible transverse susceptibility in single domain magnetic nanoparticles
title_sort parametric amplification of reversible transverse susceptibility in single domain magnetic nanoparticles
url http://dx.doi.org/10.1063/1.5079980
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AT mladenbarbic parametricamplificationofreversibletransversesusceptibilityinsingledomainmagneticnanoparticles