Direct optical observation of vertical Bloch lines propagation by in-plane field pulses

Author

Logginov, Alexander S. ; Nikolaev, Alexei V. ; Dobrovitski, Viacheslav V.

Author_Institution

Dept. of Phys., Moscow State Univ., Russia

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

2590

Lastpage

2592

Abstract

Vertical Bloch line (VBL) motion in response to in-plane field pulses is studied by the methods of polarized anisotropic dark field observation (PADO) and high-speed photography in bubble garnets. The mobility of VBLs and their velocities are measured. New types of PADO pictures which are connected with the dynamic changes of VBL and domain wall structures are observed in the nonlinear region of Bloch line motion. A difference in the dynamic behavior of VBLs of different types is observed. A qualitative discussion of the origin of PADO contrast features and VBL behavior difference is proposed

Keywords

bismuth compounds; ferrites; garnets; high-speed optical techniques; light diffraction; light polarisation; magnetic bubbles; magnetic domain walls; magnetic thin films; magneto-optical effects; thulium compounds; (BiTm)₃(FeGa)₅O₁₂ garnet film; Bloch line motion; PADO contrast features; PADO pictures; bubble garnets; direct optical observation; domain wall structures; high-speed photography; in-plane field pulses; mobility; nonlinear region; polarized anisotropic dark field observation; velocities; vertical Bloch lines propagation; Anisotropic magnetoresistance; Garnets; Geometrical optics; High speed optical techniques; Nonlinear optics; Optical polarization; Optical propagation; Optical pulses; Photography; Velocity measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.280854

Filename

280854