ACTA

Influence of Thermal Treatment on Domain Wall Dynamics in Glass-Coated Microwires

K. Richter^a, R. Varga^a and A. Zhukov^b
^aInstitute of Physics, Faculty of Sciences, P.J. Safarik University, Park Angelinum 9, 041 54 Kosice, Slovakia
^bDept. Fisica de Materiales, Fac. Quimica, UPV/EHU, San Sebastian, Spain

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We have studied the effect of thermal treatment on amorphous glass-coated Fe₄₀Si_7.5B₁₅ microwires. This microwire is characterized by transverse domain wall regime only, with maximum domain wall velocity of about 1500 m/s. Annealing at 200°C slightly increases its transverse domain wall velocity, probably due to the reduction of mechanical stresses during the thermal annealing. Annealing at 300°C leads to drastical increase of domain wall mobility and domain wall velocity of the transverse domain wall up to 2500 m/s. Moreover, vortex regime appears in this case. Thanks to it, maximum domain wall velocity of around 5000 m/s was observed.

DOI: 10.12693/APhysPolA.118.738
PACS numbers: 75.60.Ej, 75.60.Jk