The theory of elasticity and pinning of domain walls in helical magnets is presented. Domain walls perpendicular to the helical axis show non-local elasticity and are marginally pinned by local disorder. Weak anisotropy combined with magnetic dilution leads however to a non-local bulk pinning effect. Domain walls with other orientations include generically vortex arrays, similar to type-II superconductors. Their pinning force is calculated as a function of wall orientation, pitch angle and impurity concentration. It is shown that metastable domains can vary between needle and pancake like shape.
@article{arxiv.1204.4678,
title = {Pinning theory of domain walls in helical magnets},
author = {Bahman Roostaei and Thomas Nattermann},
journal= {arXiv preprint arXiv:1204.4678},
year = {2014}
}
Comments
The paper has been withdrawn due to change of format and some corrections