Results 261 to 270 of about 58,031 (307)
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Magnetic dipole imaging by a scanning magnetic microscope
Measurement Science and Technology, 2007A reconstruction technique to evaluate residual magnetic fields and simulate magnetic images due to dipole distribution in ferromagnetic samples has been proposed in connection with a scanning magnetic microscope based on a high-Tc superconducting quantum interference device (SQUID).
MAdamo1, 2, C Nappi2, E Sarnelli2
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On magnetic dipole–dipole interactions of nanoparticles in magnetic particle imaging
Physics in Medicine & Biology, 2017Magnetic dipole-dipole (MDD) interactions between iron oxide nanoparticles can influence the sensitivity, image resolution and quantification of magnetic particle imaging (MPI). For the first time, the Landau-Lifshitz-Gilbert equation (LLG) for MDD interactions has been solved to investigate the effect of MDD interactions on the MPI spectrum.
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Magnetic field of a dipole and the dipole–dipole interaction
European Journal of Physics, 2007With a data-acquisition system and sensors commercially available, it is easy to determine magnetic fields produced by permanent magnets and to study the dipole–dipole interaction for different separations and angular positions of the magnets. For sufficiently large distances, the results confirm the 1/R3 law for the magnetic field and the 1/R4 law for
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The Electric Dipole Moment of a Moving Magnetic Dipole
American Journal of Physics, 1971The fact that a magnetic dipole μ moving with velocity βc has an electric dipole moment p = β×μ/c has made periodic appearance in the literature but the importance of this fact and its general utility have not been given sufficient expression. It is the purpose of this paper to show how to derive the equation p=β×/c and then to use it for a simple ...
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Magnetization of Magnetite Nanoparticles Mediums with Weak Magnetic Dipole–Dipole Interaction
Journal of Nanoscience and Nanotechnology, 2011Magnetization expression of weak interacting (mH/kT = 1-1.5) magnetite nanoparticles mediums was determined. Experimental and calculated magnetization curves, initial magnetic susceptibility of magnetite nanoparticle mediums were compared. It is showed are agree.
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Physics of Fluids, 2017
This work describes a numerical model to compute the translational and rotational motion of N spherical magnetic particles settling in a quiescent viscous fluid under creeping flow condition. The motion of the particles may be produced by the action of gravitational forces, Brownian thermal fluctuations, magnetic dipole-dipole interactions, external ...
R. G. Gontijo, F. R. Cunha
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This work describes a numerical model to compute the translational and rotational motion of N spherical magnetic particles settling in a quiescent viscous fluid under creeping flow condition. The motion of the particles may be produced by the action of gravitational forces, Brownian thermal fluctuations, magnetic dipole-dipole interactions, external ...
R. G. Gontijo, F. R. Cunha
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Dipole-dipole energy in magnetic crystals
Physics Letters A, 1974Abstract The magnetic dipole-dipole energy of a set of magnetic moments on a set of equivalent positions in a collinear magnetic crystal having a magnetic configuration of cubic symmetry is shown to be zero.
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Dipole‐Dipole Interaction in Fine Particle Magnets
physica status solidi (b), 1990Contrairement a l'approche precedente qui consistait a caracteriser chaque particule par sa coercitivite propre on considere ici des amas inclus dans un environnement. Les spheres de plus proche voisinage sont decrites comme des particules discretes alors que les autres sont considerees par leur champ de ...
K. Elk, V. Christoph
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General Relativity and Gravitation, 1990
A solution of the Einstein-Maxwell equations representing a massive magnetic dipole is investigated. Problems of its physical interpretation are discussed and test particle motion is studied.
D. Vokrouhlický, V. Karas
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A solution of the Einstein-Maxwell equations representing a massive magnetic dipole is investigated. Problems of its physical interpretation are discussed and test particle motion is studied.
D. Vokrouhlický, V. Karas
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American Journal of Physics, 1971
In this paper we derive the expression for force on a magnetic dipole in an elementary way but without using “poles.” The equation F = (μ ·∇)B follows from concepts of electromagnetism already familiar to the first-year student. This is accomplished by working with forces on current elements and grouping terms to attain recognizable vector identities ...
Jack B. Greene, Frank G. Karioris
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In this paper we derive the expression for force on a magnetic dipole in an elementary way but without using “poles.” The equation F = (μ ·∇)B follows from concepts of electromagnetism already familiar to the first-year student. This is accomplished by working with forces on current elements and grouping terms to attain recognizable vector identities ...
Jack B. Greene, Frank G. Karioris
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