The static coercivity of stripe and bubble domains in 5-μm (YSmCa) 3(FeGe)5O12 epitaxial garnet films was measured by the oscillating-wall method. The dependence of coercivity on Ne+ implantation energy and dosage was investigated. In a wide range of energy and dosage, implantation was found to eliminate hard bubbles and decrease bubble coercivity by 25%; the decrease is a measure of the contribution of Bloch lines to coercivity. The average number of Bloch lines n in bubble walls was determined from static coercivity as 37≤n≤62, n increasing with quality factor Q. Bubble coercivity was always found to be higher than stripe coercivity measured by the same method. Implantation has no measurable effect on apparent stripe coercivity which may be a consequence of the lower Bloch line density of stripes relative to bubbles.
ASJC Scopus subject areas
- Physics and Astronomy(all)