Electronic Resource
Springer
Czechoslovak journal of physics
34 (1984), S. 1090-1101
ISSN:
1572-9486
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Conclusion The dynamic equilibrium bubble domain lattices created by nonuniform magnetic field pulses were investigated in the region of pulse amplitudes where the domain structure behaved in the most regular way. The lattice formation was found possible in a rather narrow range of the bias field values (withinH e〈H〈H col) and in the area of the sample betweens 2- ands 1-boundaries. Detailed parameters on these boundaries (position, field and field gradient) were measured and calculated as functions of the bias field and the pulse field amplitude. The boundarys 2 was understood as being the position in the sample where the total stray + applied field during the field pulses equalsH e. A next magnetostatic calculation of the domain structure in the nonuniform field should give an appropriate theoretical formula fors 1. High-speed photography has been used to record the immediate patterns of the domain structure both during a single field pulse and between the pulses. The obtained pictures made it possible to calculate the magnetic stray fields and stray field gradients when a simplified dipole model of the observed pattern was used. The attraction towards the wire has been compared with the repulsion due to the stray fields and their difference in the case of the equilibrium bubble lattice has been compared with the material coercivity term. The coercivity of the material was found to have very small influence on the translation of the domains during the process of the formation and spreading of the bubble lattice, which was attributed to the repetitive pulse component of the applied field.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01590104
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