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The role of uniaxial magnetic anisotropy distribution on domain wall tilting in amorphous glass-coated microwires

Abstract : Magnetic properties of highly magnetostrictive amorphous glass-coated microwires are strongly correlated to the presence of a glass coating that introduces a spatially inhomogeneous stress field distribution. We investigate the influence of mechanical stresses on the inclination of magnetic domain walls in magnetic microwires. Magneto-optical Kerr effect imaging is used to compare the tilted orientation of the domain wall shape in as-cast and annealed microwires. Angular dependencies of magnetization loops measured by alternating gradient field magnetometry reveal that the change of domain wall tilting with annealing is related to the decrease of a magnetic anisotropy with axial orientation. Finally, micromagnetic simulations are used to show that sufficiently high uniaxial magnetic anisotropy gives rise to the presence of the observed charged domain walls with tilted orientation.
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https://hal-cnrs.archives-ouvertes.fr/hal-03121207
Contributor : Andre Thiaville <>
Submitted on : Tuesday, January 26, 2021 - 11:20:53 AM
Last modification on : Saturday, May 1, 2021 - 3:37:56 AM
Long-term archiving on: : Tuesday, April 27, 2021 - 6:30:08 PM

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Kornel Richter, Andre Thiaville, Rastislav Varga, Jeffrey Mccord. The role of uniaxial magnetic anisotropy distribution on domain wall tilting in amorphous glass-coated microwires. Journal of Applied Physics, American Institute of Physics, 2020, 127 (19), pp.193905. ⟨10.1063/5.0005532⟩. ⟨hal-03121207⟩

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