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Gyrotropic propagation of vertical Bloch lines

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4 Author(s)
L. Arnaud ; CENG, Grenoble, France ; F. Boileau ; L. Zimmermann ; D. Challeton

Vertical Block line (BL) gyrotropic propagation was studied experimentally. Single BLs nucleated in an as-grown (YSmBi)3(FeGa)5O12 garnet film were viewed directly using the PADO (polarized anisotropic dark-field observation) technique. Gyrotropic force was provided by an asymmetrical triangular-shaped bias field pulse. A short-risetime pulse moved the line of a straight wall in one direction, whereas a large-risetime pulse moved it backward. This gyrotropic propagation phenomenon is reproducible for varying bias field; however, some scatter is observed in BL displacement. Block wall response to the bias field pulses is also considered. The range of effective drive field inducing good gyrotropic propagation is discussed

Published in:

IEEE Transactions on Magnetics  (Volume:25 ,  Issue: 5 )