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Ultrahigh‐Density Arrays of Ferromagnetic Nanorings on Macroscopic Areas
Author(s) -
Zhu F. Q.,
Fan D.,
Zhu X.,
Zhu J.G.,
Cammarata R. C.,
Chien C.L.
Publication year - 2004
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200400675
Subject(s) - materials science , vortex , area density , ferromagnetism , condensed matter physics , micromagnetics , nanoring , nanotechnology , process (computing) , magnetization , magnetic field , composite material , mechanics , physics , quantum mechanics , computer science , operating system
Arrays of ten billion Co nanorings , with inner diameters of 100 nm, wall widths of 20 nm, and of an ultrahigh areal density of 45 rings μm –2 , are fabricated on a macroscopic area. Magnetometric measurements and micromagnetic simulations reveal two parallel switching processes: a vortex reversal process and a rotating onion process.