Negative Mobility of Single Domain Wall in Magnetic Microwires
R. Vargaa, K. Richtera and A. Zhukovb
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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Here, we present the domain wall dynamics in thin magnetic wires that exhibit even negative mobility regime. Such a regime is well below the Walker limit and is a result of structural relaxation. It disappears at high frequencies and it can be enhanced by application of mechanical stress. Moreover, the domain wall velocity was found to be almost field-independent at certain measuring conditions. Anyway, the domain wall velocity remains quite high (> 450 m/s) in this regime.
DOI: 10.12693/APhysPolA.118.747
PACS numbers: 75.60.Ej, 75.60.Jk