Annihilation of vertical-Bloch-line chains in the walls of ordinary hard bubbles subjected to joint static bias field and in-plane field

Abstract

For the ordinary hard bubbles (OHBs) of garnet bubble films, the annihilation of the vertical-Blochline (VBL) chains in their walls subjected to joint static bias field Hb and in-plane field Hip was experimentally studied. The curves of two critical in-plane fields, Hip(1) and Hip', vs Hb were measured. By means of the so-called head-cut and tail-cut experiments designed in this work, it was verified that for the OHBs subjected to Hip, their VBL chains with different lengths lose VBLs and become shorter simultaneously. It was also verified that the critical in-plane fields Hip(1) and Hip' correspond to the breakdown of the shortest and longest VBL chains of OHBs, respectively.