We analyse the impact of growth conditions on asymmetric magnetic bubble expansion under in-plane field in ultrathin Pt / Co / Pt films. Specifically, using sputter deposition we vary the Ar pressure during the growth of the top Pt layer. This induces a large change in the interfacial structure as evidenced by a factor three change in the effective perpendicular magnetic anisotropy. Strikingly, a discrepancy between the current theory for domain-wall propagation based on a simple domain-wall energy density and our experimental results is found. This calls for further theoretical development of domain-wall creep under in-plane fields and varying structural asymmetry.
@article{arxiv.1503.08999,
title = {Asymmetric magnetic bubble expansion under in-plane field in Pt/Co/Pt: effect of interface engineering},
author = {Reinoud Lavrijsen and Dion Hartmann and Arno van den Brink and Yuxiang Yin and Beatriz Barcones and Rembert Duine and Marcel Verheijen and Henk Swagten and Bert Koopmans},
journal= {arXiv preprint arXiv:1503.08999},
year = {2015}
}