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Probing Fractal Magnetic Domains on Multiple Length Scales in Nd2Fe14B

TitleProbing Fractal Magnetic Domains on Multiple Length Scales in Nd2Fe14B
Publication TypeJournal Article
Year of Publication2009
AuthorsKreyssig A, Prozorov R, Dewhurst CD, Canfield PC, McCallum RW, Goldman AI
Journal TitlePhysical Review Letters
Volume102
Pages047204
Date Published01/30
ISBN Number0031-9007
Accession NumberISI:000262978600068
Keywordsdependence, force microscopy, growth, ndfeb, permanent-magnets, single-crystals, small-angle scattering
Abstract

Using small-angle neutron scattering, we demonstrate that the complex magnetic domain patterns at the surface of Nd2Fe14B, revealed by quantitative Kerr and Faraday microscopy, propagate into the bulk and exhibit structural features with dimensions down to 6 nm, the domain wall thickness. The observed fractal nature of the domain structures provides an explanation for the anomalous increase in the bulk magnetization of Nd2Fe14B below the spin-reorientation transition. These measurements open up a rich playground for studies of fractal structures in highly anisotropic magnetic systems.
URL<Go to ISI>://000262978600068
DOI10.1103/Physrevlett.102.047204