Title :
Gyrotropic propagation of vertical Bloch lines
Author :
Arnaud, L. ; Boileau, F. ; Zimmermann, L. ; Challeton, D.
Author_Institution :
CENG, Grenoble, France
fDate :
9/1/1989 12:00:00 AM
Abstract :
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
Keywords :
garnets; magnetic bubble memories; magnetic domain walls; yttrium compounds; (YSmBi)3(FeGa)5O12 garnet film; PADO; asymmetrical triangular-shaped bias field pulse; gyrotropic propagation; gyrotropic propagation phenomenon; large-risetime pulse; polarized anisotropic dark-field observation; short-risetime pulse; varying bias field; vertical Bloch lines; Anisotropic magnetoresistance; Conducting materials; Displacement measurement; Garnet films; Gyrotropism; Polarization; Pulse measurements; Pulse shaping methods; Scattering; Shape;
Journal_Title :
Magnetics, IEEE Transactions on
