Bloch-line dynamics within moving domain walls in 3D ferromagnets

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Herranen, Touko
dc.contributor.author Laurson, Lasse
dc.date.accessioned 2018-08-01T13:34:52Z
dc.date.available 2018-08-01T13:34:52Z
dc.date.issued 2017-10-18
dc.identifier.citation Herranen , T & Laurson , L 2017 , ' Bloch-line dynamics within moving domain walls in 3D ferromagnets ' Physical Review B , vol 96 , no. 14 , 144422 . DOI: 10.1103/PhysRevB.96.144422 en
dc.identifier.issn 2469-9950
dc.identifier.issn 1550-235X
dc.identifier.other PURE UUID: d8b5da0d-97cd-4955-b524-26b97d2fbe0e
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/blochline-dynamics-within-moving-domain-walls-in-3d-ferromagnets(d8b5da0d-97cd-4955-b524-26b97d2fbe0e).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85037711630&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/26774701/PhysRevB.96.144422.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/32923
dc.description.abstract We study field-driven magnetic domain wall dynamics in garnet strips by large-scale three-dimensional micromagnetic simulations. The domain wall propagation velocity as a function of the applied field exhibits a low-field linear part terminated by a sudden velocity drop at a threshold field magnitude, related to the onset of excitations of internal degrees of freedom of the domain wall magnetization. By considering a wide range of strip thicknesses from 30 nm to 1.89μm, we find a nonmonotonic thickness dependence of the threshold field for the onset of this instability, proceeding via nucleation and propagation of Bloch lines within the domain wall. We identify a critical strip thickness above which the velocity drop is due to nucleation of horizontal Bloch lines, while for thinner strips and depending on the boundary conditions employed, either generation of vertical Bloch lines, or close-to-uniform precession of the domain wall internal magnetization takes place. For strips of intermediate thicknesses, the vertical Bloch lines assume a deformed structure due to demagnetizing fields at the strip surfaces, breaking the symmetry between the top and bottom faces of the strip, and resulting in circulating Bloch line dynamics along the perimeter of the domain wall. en
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Physical Review B en
dc.relation.ispartofseries Volume 96, issue 14 en
dc.rights openAccess en
dc.subject.other Electronic, Optical and Magnetic Materials en
dc.subject.other Condensed Matter Physics en
dc.subject.other 114 Physical sciences en
dc.title Bloch-line dynamics within moving domain walls in 3D ferromagnets en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Complex Systems and Materials
dc.contributor.department Department of Applied Physics
dc.subject.keyword Electronic, Optical and Magnetic Materials
dc.subject.keyword Condensed Matter Physics
dc.subject.keyword 114 Physical sciences
dc.identifier.urn URN:NBN:fi:aalto-201808014324
dc.identifier.doi 10.1103/PhysRevB.96.144422
dc.type.version publishedVersion


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