Stabilization of helical magnetic structures in thin multilayers
Abstract
Based on micromagnetic simulations, we report on a novel helical magnetic structure in a soft magnetic film that is sandwiched between and exchange-coupled to two hard magnetic layers. Confined between antiparallel hard magnetic moments, a helix with a turn of 180 is stable without the presence of an external magnetic field. The magnetic stability is determined by the energy minimization and is a result of an internal field created by exchange interaction and anisotropy. Since the internal field stores magnetic energy, the helix can serve as an energy-storing element in spin-based nanodevices. Due to the significantly different magnetic resonance frequencies, the ferromagnetic and helical ground states are easy to distinguish in a broadband ferromagnetic resonance experiment.
Cite
@article{arxiv.1412.1379,
title = {Stabilization of helical magnetic structures in thin multilayers},
author = {L. V. Dzemiantsova and G. Meier and R. Röhlsberger},
journal= {arXiv preprint arXiv:1412.1379},
year = {2014}
}
Comments
4 pages, 3 figures