Multidomain and incoherent effects in magnetic nanodots | Zendy

R. Skomski | Zendy; Arti Kashyap | Zendy; K. D. Sorge | Zendy; D. J. Sellmyer | Zendy

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Multidomain and incoherent effects in magnetic nanodots

Author(s) -

R. Skomski,

Arti Kashyap,

K. D. Sorge,

D. J. Sellmyer

Publication year - 2004

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.1688645

Subject(s) - condensed matter physics , micromagnetics , curling , nanodot , ellipsoid , magnetization , single domain , magnetic domain , particle (ecology) , domain wall (magnetism) , materials science , magnetic nanoparticles , square (algebra) , ground state , physics , nanoparticle , nanotechnology , geometry , magnetic field , atomic physics , composite material , oceanography , mathematics , quantum mechanics , astronomy , geology

The magnetic ground state and the magnetization reversal of aspherical nanoparticles are investigated by model calculations and micromagnetic simulations. Essential deviations from Kittel’s domain theory occur for very flat and very elongated particles, for particles whose size is comparable to the domain-wall width, and when the particle shape is strongly nonellipsoidal. For example, the single-domain state of square rod is much less stable than that of comparable elongated ellipsoids, because most of the surface charge of long ellipsoids is located on the sides. Another specific feature of flat particles is suppression of the curling mode.

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