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Domain Walls in Bent Nanowires

 
: Lofink, F.; Philippi-Kobs, A.; Azad, M.R.R.; Hankemeier, S.; Hoffmann, G.; Frömter, R.; Oepen, H.P.

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Physical review applied 8 (2017), No.2, Art. 024008
ISSN: 2331-7019
Deutsche Forschungsgemeinschaft DFG
SFB 668 "Magnetismus vom Einzelatom zur Nanostruktur"
English
Journal Article
Fraunhofer ISIT ()

Abstract
The influence of geometric parameters on the magnetic fine structure of domain walls in bent nanowires is investigated. The domain pattern in the soft-magnetic Co39Fe54Si7 alloy is studied via scanning electron microscopy with polarization analysis and modeled via micromagnetic simulations. It is demonstrated that the bending angle affects details of the microstructure as well as the preponderant domain-wall type. A phenomenological model is developed that provides the global energy minimum of individual types of domain walls as a function of the geometric parameters of the wire. The results can be directly transferred to permalloy wires, as permalloy and Co39Fe54Si7 alloy have a comparable magnetostatic exchange length.

: http://publica.fraunhofer.de/documents/N-480522.html