The formation of vertical Bloch line in the garnet bubble films subjected to pulsed bias field

Abstract

We studied experimentally the dynamic characteristics of hard domains produced in the garnet bubble films at different pulse widths. The results show that the dumbbell domains contracted from multi-branched domains at zero static bias field rotate clockwise， independent of the pulse width of the pulsed bias field in which the multi-branched domains were produced. In the direct current fixed bias fields， soft domain segments harden and become dumbbell domains. How the dumbbell domains rotate is dependent on the pulse widths of the hardening pulsed bias field applied in the experiment. The results show that all the dumbbell domains rotate anticlockwise when the pulse width is narrow， and they rotate clockwise and anticlockwise simultaneously and then they all rotate clockwise as the width of hardening pulse becomes wider and wider. It reveals that the direct current bias field and pulsed bias field have great influence on the types of vertical Bloch line in the garnet bubble films.

Influence of Temperature on Equilibrium Separation Between Vertical Bloch Lines in OHBs in Garnet Bubble Films

“…The devices used in the experiments are identical with that in Refs. [13,14]. The nominal compositions of samples 1-3 are (YSmCa) 3 (FeGe) 5 O 12 .…”