Investigation of the magnetization process of domain walls in an iron-garnet film by direct optical observation of vertical Bloch lines
- Moscow State Univ., Moscow (SU)
- Purdue Univ., Lafayette, IN (USA). School of Electrical Engineering
Vertical Bloch lines (VBL) were observed in a (YLuBi){sub 3}(FeGa){sub 5}O{sub 12} magnetic garnet film from the light diffracted from the stripe domains. Experiments on the motion of the Bloch lines in response to magnetic fields perpendicular to and in the plane of the film were performed. For a bias field pulse perpendicular to the film there was a non-linear relationship between pulse amplitude and VBL displacement. The minimum static in-plane field for VBL displacement (VBL coercivity) was 1.3 {plus minus} 0.4 Oe. Winding VBL pairs disappeared at an in-plane field of 3.5 Oe and unwinding pairs were annihilated at lower values of in-plane field. In experiment, the amplitude of VBL displacement in response to a low frequency ac in-plane field was measured. This experiment can be used to quantify the energy of the VBL in the vicinity of the pinning sites which were found to occur regularly along the domain wall. This paper reports that a considerable variation in the strength and spacing of the pinning sites was found in the film studied.
- OSTI ID:
- 5777023
- Journal Information:
- IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA), Vol. 26:5; ISSN 0018-9464
- Country of Publication:
- United States
- Language:
- English
Similar Records
Nonuniform wall motion in magnetic stripe domains and its effect on vertical Bloch line propagation
Direct investigations of Bloch line memory functions by wall resonance spectroscopy
Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
GARNETS
THIN FILMS
MAGNETIC PROPERTIES
BLOCH WALL
DISLOCATION PINNING
DOMAIN STRUCTURE
LIGHT SCATTERING
MAGNETIC FIELDS
NONLINEAR PROBLEMS
FILMS
MINERALS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCATTERING
SILICATES
SILICON COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies