Kun, F.
(Department of Theoretical Physics, University of Debrecen, P.O. Box 5, H-4010 Debrecen, Hungary)
,
Pál, K.F.
(Institute of Nuclear Research (ATOMKI), P.O. Box 51, H-4001 Debrecen, Hungary)
,
Wen, Weijia
(Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong)
,
Tu, K.N.
(Department of Materials Sciences and Engineering, UCLA, Los Angeles, CA 90095-1595, USA)
AbstractAn experimental and theoretical study of the deformation and break-up process of rings, formed by magnetic microspheres, under the application of an external magnetic field is reported in this Letter. When the external magnetic field is applied parallel to the plane of the rings, we found th...
AbstractAn experimental and theoretical study of the deformation and break-up process of rings, formed by magnetic microspheres, under the application of an external magnetic field is reported in this Letter. When the external magnetic field is applied parallel to the plane of the rings, we found that the break-up process has three different outcomes depending on the way of application and time history of the external field: (a) deformation into a compact set of dipoles with a triangular lattice structure, (b) opening into a single chain, and (c) break-up into two chains with various relative sizes. A thorough theoretical investigation of the break-up process has been carried out based on computer simulations, taking into account solely the dipole–dipole and dipole–external field interactions, without thermal noise. The experimental results and the simulations are in good agreement.
AbstractAn experimental and theoretical study of the deformation and break-up process of rings, formed by magnetic microspheres, under the application of an external magnetic field is reported in this Letter. When the external magnetic field is applied parallel to the plane of the rings, we found that the break-up process has three different outcomes depending on the way of application and time history of the external field: (a) deformation into a compact set of dipoles with a triangular lattice structure, (b) opening into a single chain, and (c) break-up into two chains with various relative sizes. A thorough theoretical investigation of the break-up process has been carried out based on computer simulations, taking into account solely the dipole–dipole and dipole–external field interactions, without thermal noise. The experimental results and the simulations are in good agreement.
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