Results 261 to 270 of about 13,083 (302)

Magnet Pacemaker Reversion

JAMA: The Journal of the American Medical Association, 1973
To the Editor.— Lescoe's LETTER TO THE EDITOR (223:1510, 1973) regarding the dangers in the use of a magnet to revert a pacemaker to asynchronous mode must be refuted. For years the Newark Beth Israel Medical Center has been interested in in-hospital clinic evaluation of pacemakers using waveform analysis, the system recommended by Lescoe, as a ...
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Magnetization reversal dynamics in ultrathin magnetic layers

Physical Review B, 1996
Abstract We propose an analytical expression for the magnetization reversal in ultrathin magnetic layers, modelling the aftereffects and, for the first time, taking into account both domain wall motion and nucleation processes. We apply our model to quantify the dynamic properties of the magnetization of a MoS 2 /[Au(40 nm)/Co(0.8 nm)/Au(3 nm ...
, Raquet, , Mamy, , Ousset
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The magnetization reversal process in spin spring magnets

Nanotechnology, 2008
The behavior of soft magnetic films in spring magnets, as a function of the intensity and orientation of an external magnetic field, is described in the framework of spin-polarized non-collinear electronic structure calculations. As experimentally observed, the critical intensity of the external field required for the onset of the non-collinear spiral ...
V M, Uzdin, A, Vega
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Magnetization reversal in interacting magnetic systems

Journal of Applied Physics, 2005
The effect of interparticle interactions on the precessional switching process of coupled ellipsoidally shaped particles subject to pulsed magnetic fields is analyzed by using the Landau–Lifshitz–Gilbert equation. The analysis of switching process is made using two different representations previously proposed in the case of isolated single domain ...
Huy Ngoc Pham, Ioan Dumitru, Alexandru Stancu, Leonard Spinu   +3 more
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Magnetic reversals and mass extinctions

Nature, 1985
Previous analyses of the time distribution of reversals of the Earth's magnetic field have yielded mixed results. Some authors have claimed significant periodicities of order 10(7) yr whereas others have reported failure to reject null hypothesis of random spacing at that scale.
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Millimicrosecond Magnetization Reversal in Thin Magnetic Films

IBM Journal of Research and Development, 1959
A special pulse equipment including a pulse sampling oscilloscope with an overall response time of 0.35 mμsec for the observation of the millimicrosecond flux reversal in thin permalloy films is described. Output signals as short as 1 mμsec have been obtained and are discussed with respect to the underlying reversal processes.
Wolfgang Dietrich, Walter E. Proebster
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Reversals of the earth's magnetic field

Physics Reports, 1971
Abstract One of the most intriguing problems in geophysics to-day is why the Earth's magnetic field reverses. This review summarizes the progress in our knowledge of the subject since Bullard's [1] Bakerian Lecture to the Royal Society in 1967. Reversals have played a major role in the changed outlook in geological thinking through the development of
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Magnetization Reversal in Magnetic Bilayer Systems*

Chinese Physics Letters, 2019
Magnetization reversal in magnetic soft/hard bilayer systems is studied analytically by means of a variational method for magnetic energies in a continuum model. The demagnetization curve is involved with nonlinear equations, and the solution is given implicitly in the form of Jacobi functions, which is valid for the total reversal ...
Li-Peng Jin, Yong-Jun Liu
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Magnetism and magnetic reversals in ferromanganese nodules

Earth and Planetary Science Letters, 1973
We have studied the strength, stability and direction of natural remanent magnetization of 25 deep-sea, JOIDES, shallow marine and fresh-water ferromanganese nodules. The nodules contain a reasonably stable and isotropic NRM of about the same magnitude as deep-sea sediments.
E.A. Crecelius, Roy Carpenter, R.T. Merrill   +2 more
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Electrical Magnetization Reversal in Ferromagnetic Semiconductors

2004 International Conference on MEMS, NANO and Smart Systems (ICMENS'04), 2004
III-V magnetic semiconductors, (Ga,Mn)As and (In,Mn)As, exhibit carrier-induced ferromagnetism and their magnetic properties are explained well by a mean-filed model [1]. They are among the promising materials for semiconductor spintronics because of novel spin-related phenomena in devices based on them, e.g.
Fumihiro Matsukura, Daichi Chiba, Michihiko Yamanouchi, Hideo Ohno   +3 more
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