Influence of in-plane field on the stability of vertical Bloch lines in the walls of OHB at various bias fields

Abstract

The stability of vertical Bloch line (VBL) chains subjected to in-plane field ( H ip) was statistically studied for the ordinary hard bubbles (OHB) in garnet bubble films at various bias fields ( H b). The dumbbell domains were also investigated. We found that ( H ip (1)) IID<( H ip (1)) ID<( H ip (1)) OHB and ( H ip (2)) IID=( H ip (2)) ID=( H ip (2)) OHB when keeping H b unchanged. With the increasing of H b, the in-plane field H ip (1), H ip * and H ip (2) all decrease, while the in-plane field range [ H ip (1), H ip * ] and [ H ip (1), H ip (2)] become narrower. Here, H ip (1) is the initial critical in-plane field where VBLs in the walls of three types of hard domains are annihilated, H ip * stands for the in-plane field where the retention rate of three types of hard domains R reduces to zero, and H ip (2) is the lowest in-plane field where VBLs in their corresponding hard domains are annihilated completely.