Journal ArticleDOI
Model of thermally activated magnetization reversal in thin films of amorphous rare-earth-transition-metal alloys
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TLDR
Monte Carlo simulations on a two-dimensional lattice of magnetic dipoles have been performed to investigate the magnetic reversal by thermal activation in rare-earth-transition-metal (RE-TM) alloys and the fractal dimension of thedomain wall was found to be a good measure of the jaggedness of the domain boundary surface during the growth process.Abstract:
Monte Carlo simulations on a two-dimensional lattice of magnetic dipoles have been performed to investigate the magnetic reversal by thermal activation in rare-earth-transition-metal (RE-TM) alloys. Three mechanisms of magnetization reversal were observed: nucleation dominated growth, nucleation followed by the growth of magnetic domains containing no seeds of unreversed magnetization, and nucleation followed by dendritic domain growth by successive branching in the motion of the domain walls. The domain structures are not fractal; however, the fractal dimension of the domain wall was found to be a good measure of the jaggedness of the domain boundary surface during the growth process. The effects of the demagnetizing field on the hysteretic and time-dependent properties of the thin films were studied and some limitations in the application of the Fatuzzo model on magneto-optic media are identified.read more
Citations
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Mechanisms for exchange bias
TL;DR: In this article, a general theoretical formulation of the bias problem is proposed, and an expression for the interface energy is derived, with particular emphasis on the roles of interface structure and temperature.
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Magnetization reversal in ultrathin ferromagnetic films with perpendicular anisotropy
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Book ChapterDOI
Dynamics of Magnetization Reversal: From Continuous to Patterned Ferromagnetic Films
TL;DR: In this paper, the dynamics of magnetization reversal in ultrathin ferromagnetic films and in related laterally patterned nanostructures down to the nanosecond range is presented.
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Magnetic behavior of field induced spin-clusters in amorphous Fe2O3
TL;DR: In this article, the magnetic properties of bulk amorphous Fe 2 O 3 have been investigated using a dc magnetization technique, as a function of magnetic field and temperature, and a mean diameter of ∼30 A for the spin-clusters has been found.
Journal ArticleDOI
Magneto-optical microscope magnetometer for simultaneous local probing of magnetic properties
Sug-Bong Choe,Dong-Hyun Kim,Yoon-Chul Cho,Hyukjae Jang,Kwang-Su Ryu,Hae-Seung Lee,Sung-Chul Shin +6 more
TL;DR: In this article, the design of a magneto-optical microscope magnetometer (MOMM) for simultaneously probing local magnetic properties is described, which is capable of simultaneous measurement of magnetic hysteresis loops and magnetization viscosity curves on 8000 individual local regions in ferromagnetic materials.
References
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Pore-Scale Viscous Fingering in Porous Media
Jing-Den Chen,David T. Wilkinson +1 more