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arXiv:0901.3515cond-mat.mtrl-sci

Probing fractal magnetic domains on multiple length scales in Nd2Fe14B

A. Kreyssig, R. Prozorov, C. D. Dewhurst, P. C. Canfield, R. W. McCallum, A. I. Goldman

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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.

arXiv comments
Accepted for publication in Phys. Rev. Lett. (4 pages, 4 figures)
Journal reference
Phys. Rev. Lett. 102, 047204 (2009)
DOI
doi:10.1103/PhysRevLett.102.047204
Subjects
cond-mat.mtrl-sciMaterials Science cond-mat.str-elStrongly Correlated Electrons

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  1. Scientists discover fractal patterns in a quantum material 1 comment

    • Magnetic domain transtitions are phase transitions, just like the solidifcation of a snowflake. It's not that surprising to me that magnetic domain structure could be fractal, many phase transitions can look fractal in the right conditions, of which water solidifcation into…

      blixView on HNParent context

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