This work explores the static and dynamic magnetic properties of weakly antiferromagnetically coupled Fe/Ti superlattices, emphasizing the link between magnetic behavior and structural characteristics. HRTEM and XRD analyses confirm alternating Fe and Ti layers with rough interfaces, especially in upper layers. Magnetic measurements reveal two-step hysteresis loops and a temperature and thickness-dependent interlayer exchange coupling (IEC). A macrospin model incorporating bilinear and biquadratic coupling reproduces the experimental data and supports a phase diagram analysis identifying non-collinear configurations. The results underscore the impact of structural imperfections and highlight the crucial role of biquadratic exchange in Fe/Ti/Fe multilayers.
@article{arxiv.2605.14545,
title = {Biquadratic exchange coupling effect on the magnetic properties of (Fe/Ti) multilayers},
author = {Melissa Yactayo and H. S. Tarazona and O. Copie and J. -C. Rojas-Sánchez and J. Quispe-Marcatoma and C. V. Landauro},
journal= {arXiv preprint arXiv:2605.14545},
year = {2026}
}