Gyrotropic propagation of vertical Bloch lines

Author

Arnaud, L. ; Boileau, F. ; Zimmermann, L. ; Challeton, D.

Author_Institution

CENG, Grenoble, France

Volume

25

Issue

5

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

4251

Lastpage

4253

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.42585

Filename

42585