Quantitative determination of domain wall coupling energetics | Zendy

M. Laufenberg | Zendy; Daniel Bedau | Zendy; H. Ehrke | Zendy; Mathias Kläui | Zendy; U. Rüdiger | Zendy; D. Backes | Zendy; L. J. Heyderman | Zendy; F. Nolting | Zendy; C. A. F. Vaz | Zendy; J. A. C. Bland | Zendy; Takeshi Kasama | Zendy; Rafal E. DuninBorkowski | Zendy; S. Cherifi | Zendy; Andrea Locatelli | Zendy; Stefan Heun | Zendy

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Quantitative determination of domain wall coupling energetics

Author(s) -

M. Laufenberg,

Daniel Bedau,

H. Ehrke,

Mathias Kläui,

U. Rüdiger,

D. Backes,

L. J. Heyderman,

F. Nolting,

C. A. F. Vaz,

J. A. C. Bland,

Takeshi Kasama,

Rafal E. DuninBorkowski,

S. Cherifi,

Andrea Locatelli,

Stefan Heun

Publication year - 2006

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2207220

Subject(s) - photoemission electron microscopy , electron holography , domain wall (magnetism) , magnetic circular dichroism , nucleation , condensed matter physics , demagnetizing field , magnetic field , vortex , magnetic domain , materials science , coupling (piping) , dipole , magnetic dipole–dipole interaction , resolution (logic) , molecular physics , physics , optics , electron microscope , holography , magnetization , quantum mechanics , astronomy , metallurgy , thermodynamics , spectral line , artificial intelligence , computer science

International audienceThe magnetic dipolar coupling of head-to-head domain walls is studied in 350 nm wide NiFe and Co nanostructures by high resolution magnetic imaging. We map the stray field of a domain wall directly with sub-10-nm resolution using off-axis electron holography and find that the field intensity decreases as 1/r with distance. By using x-ray magnetic circular dichroism photoemission electron microscopy, we observe that the spin structures of interacting domain walls change from vortex to transverse walls, when the distance between the walls is reduced to below (77±5) nm for 27 nm thick NiFe and (224±65) nm for 30 nm thick Co elements. Using measured stray field values, the energy barrier height distribution for the nucleation of a vortex core is obtained

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