Journal ArticleDOI
Effect of alignment of easy axes on dynamic magnetization of immobilized magnetic nanoparticles
Takashi Yoshida,Yuki Matsugi,Naotaka Tsujimura,Teruyoshi Sasayama,Keiji Enpuku,Thilo Viereck,Meinhard Schilling,Frank Ludwig +7 more
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TLDR
In this paper, the effect of the alignment of the magnetic easy axes on the dynamic magnetization of immobilized magnetic nanoparticles under an AC excitation field was explored, and it was shown that the parallel-aligned sample has the largest hysteresis in the magnetization curve and the largest harmonic magnetization spectra.About:
This article is published in Journal of Magnetism and Magnetic Materials.The article was published on 2017-04-01. It has received 46 citations till now. The article focuses on the topics: Magnetic anisotropy & Magnetization.read more
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Evaluation of effective magnetic anisotropy constant of magnetic nanoparticles from coercive field of AC magnetization curve
TL;DR: In this article, a numerical simulation of the magnetic anisotropy constant Hc of an AC magnetization (M-H) curve of immobilized MNPs was performed and an analytical expression for Hc was obtained based on the previously obtained expression.
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Simulating magnetization dynamics of large ensembles of single domain nanoparticles: Numerical study of Brown/Néel dynamics and parameter identification problems in magnetic particle imaging
TL;DR: In this paper, a unified computational framework was developed and investigated to solve two parameter identification problems in the context of the chosen application, magnetic particle imaging, which can be used to compare quantitatively or qualitatively to measured data.
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Thermal simulation of magnetization reversals for a size-distributed assembly of nanoparticles with uniaxial and cubic anisotropies
N. Ryon,J. Richy,C. J. Sheppard,A. R. E. Prinsloo,A. Fessant,J.-Ph. Jay,David Spenato,D. T. Dekadjevi +7 more
TL;DR: In this paper, a temperature-dependent coherent magnetization reversal model is proposed for size-distributed assemblies of ferromagnetic nanoparticles (NPs), where NPs are assumed to be of uniaxial and cubic anisotropies.
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Empirical and simulated evaluations of easy-axis dynamics of magnetic nanoparticles based on their magnetization response in alternating magnetic field
TL;DR: In this article, the rotation and alignment of the easy axis toward a specific direction in an alternating magnetic field are affected by fluid conditions such as viscosity, the condition of the applied magnetic field, and the magnetic properties of the nanoparticles, including anisotropy.
Estimating orientation using multi-contrast MPI
TL;DR: In this paper, the magnetic anisotropy of immobilized particles is used to estimate the orientation of samples, which can be used to determine the viscosity or temperature of the particle environment, or distinguish tracer particles based on their core size.
References
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Heating magnetic fluid with alternating magnetic field
TL;DR: In this paper, the authors developed analytical relationships and computations of power dissipation in magnetic fluid (ferrofluid) subjected to alternating magnetic field and showed that the dissipation results from the orientational relaxation of particles having thermal fluctuations in a viscous medium.
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Tomographic imaging using the nonlinear response of magnetic particles
TL;DR: A method for obtaining a high-resolution image of magnetic tracers that takes advantage of the nonlinear magnetization curve of small magnetic particles and has the potential to be developed into an imaging method characterized by both high spatial resolution as well as high sensitivity.
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Progress in applications of magnetic nanoparticles in biomedicine
Quentin A. Pankhurst,Quentin A. Pankhurst,Nguyen T. K. Thanh,Nguyen T. K. Thanh,S. K. Jones,Jon Dobson +5 more
TL;DR: A progress report on the biomedical applications of magnetic nanoparticles since 2003 is presented in this paper, with a focus on magnetic actuation for in vitro non-viral transfection and tissue engineering.
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Langevin-dynamics study of the dynamical properties of small magnetic particles
TL;DR: In this paper, the Langevin-dynamics approach was used to study the dynamics of magnetic nanoparticles, and the results were compared with different analytical expressions used to model the relaxation of nanoparticle ensembles, assessing their accuracy.
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Hyperthermic effects of dissipative structures of magnetic nanoparticles in large alternating magnetic fields
TL;DR: Numerically compared the magnetic loss in rotatable nanoparticles in aqueous media with that of non-rotatable nanoparticle anchored to localised structures to shed new light on the design of targeted magnetic hyperthermia treatments.