Experimental observation of magnetic poles inside

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dc.contributor.authorPérigo, EAen_AU
dc.contributor.authorGilbert, EPen_AU
dc.contributor.authorMetlov, KLen_AU
dc.contributor.authorMichels, Aen_AU
dc.date.accessioned2016-10-18T00:15:59Zen_AU
dc.date.available2016-10-18T00:15:59Zen_AU
dc.date.issued2014-12-15en_AU
dc.date.statistics2016-10-18en_AU
dc.description.abstractThe pole-avoidance principle of magnetostatics results in an angular anisotropy of the magnetic neutron scattering cross section dΣM dΩ. For the case of a sintered Nd–Fe–B permanent magnet, we report the experimental observation of a ‘spike’ in dΣM dΩ along the forward direction. The spike implies the presence of long-wavelength magnetization fluctuations on a length scale of at least 60 nm. Using micromagnetic theory, it is shown that this type of angular anisotropy is the result of the presence of unavoidable magnetic poles in the bulk of the magnet and is related to the q ≠ 0 Fourier modes of the magnetostatic field. Thus, our observation proves the existence of such modes.© 2014 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.en_AU
dc.identifier.citationPérigo, E. A., Gilbert, E. P., Metlov, K. L. & Michels, A. (2014). Experimental observation of magnetic poles inside bulk magnets via Fourier modes of magnetostatic field. New Journal of Physics, 16(12), 123031. doi:10.1088/1367-2630/16/12/123031en_AU
dc.identifier.govdoc7339en_AU
dc.identifier.issn1367-2630en_AU
dc.identifier.issue12en_AU
dc.identifier.journaltitleNew Journal of Physicsen_AU
dc.identifier.pagination123031en_AU
dc.identifier.urihttp://dx.doi.org/10.1088/1367-2630/16/12/123031en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7777en_AU
dc.identifier.volume16en_AU
dc.language.isoenen_AU
dc.publisherIOP Scienceen_AU
dc.subjectNeutronsen_AU
dc.subjectSpinen_AU
dc.subjectMagnetsen_AU
dc.subjectAnisotropyen_AU
dc.subjectFourier analysisen_AU
dc.subjectExperiment planningen_AU
dc.titleExperimental observation of magnetic poles insideen_AU
dc.typeJournal Articleen_AU
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