Biquadratic Exchange Coupling Effect on the Magnetic Properties of (Fe/Ti) Multilayers

Yactayo M.; Tarazona H.S.; Copie O.; Rojas-Sánchez J.-C.; Quispe-Marcatoma J.; Landauro C.V. · Proceedings - 2025 IEEE Latin American Conference on Nanotechnology, LANANO 2025 (2025) · DOI: 10.1109/lanano68466.2025.11512390

Resumen

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.

Instituciones: Universidad Nacional Mayor de San Marcos