A detailed correlative structural, magnetic and chemical analysis of non-stoichiometric cobalt ferrite micrometric crystals was performed by x-ray magnetic circular dichroism combined with photoemission microscopy, low energy electron microscopy, and atomic force microscopy. The vector magnetization at the nanoscale is obtained from magnetic images at different x-ray incidence angles and compared with micromagnetic simulations, revealing the presence of defects which pin the magnetic domain walls. A comparison of different types of defects and the domain walls location suggests that the main source of pinning in these microcrystals are linear structural defects induced in the spinel by the substrate steps underneath the islands.
@article{arxiv.2201.04384,
title = {Magnetic domain wall pinning in cobalt ferrite microstructures},
author = {Sandra Ruiz-Gómez and Anna Mandziak and Laura Martín-García and Jose Emilio Prieto and Pilar Prieto and Carmen Munuera and Michael Foerster and Adrián Quesda and Lucía Aballe and Juan de la Figuera},
journal= {arXiv preprint arXiv:2201.04384},
year = {2022}
}