RT Journal Article
T1 Interplay between structure and interfacial interactions in Fe‐Gd synthetic ferrimagnets
A1 González García, Álvaro
A1 Álvarez Chico, Alejandro
A1 Obando Guevara, Jairo
A1 Gallego, Silvia
A1 Atxitia, Unai
A1 Cojocariu, Iulia
A1 Jugovac, Matteo
A1 Menteş, Tevfik Onur
A1 Locatelli, Andrea
A1 Mascaraque Susunaga, Arantzazu
A1 González Barrio, Miguel Ángel
AB Transition metal–rare earth compounds are promising synthetic ferrimagnets for next-generation spintronic devices, where magnetic domain structure and thermal evolution are key to performance. We studied ultrathin Fe–Gd ferrimagnets grown epitaxially on W(110) by atomic layer deposition, combining element-resolved magnetic microscopy with structural characterization. Comparing Gd/Fe and Fe/Gd bilayers with homogeneous Fe1 − xGdx alloys, we find that Curie temperature (Tc) and domain behavior are governed primarily by crystallinity and interfacial coupling. In crystalline Gd/Fe, the Gd layer remains ferromagnetic up to ∼500 K, far above its bulk Tc, due to strong interfacial coupling. In contrast, poor crystallinity of the Fe layer in Fe/Gd suppresses Fe magnetic order, yielding a reduced common Tc of ∼325 K, similar to the homogeneous alloy (Tc ∼ 345 K). Atomistic spin simulations capture these trends and isolate the role of disorder. Together, these results demonstrate how structural control can be used to tune Curie and compensation temperatures in ultrathin ferrimagnetic heterostructures for ultrafast, energy-efficient spintronic applications.
PB Wiley
YR 2026
FD 2026-01-09
LK https://hdl.handle.net/20.500.14352/132282
UL https://hdl.handle.net/20.500.14352/132282
LA eng
NO González‐García, Á., Álvarez‐Chico, A., Obando‐Guevara, J., Gallego, S., Atxitia, U., Cojocariu, I., ... & González‐Barrio, M. Á. (2026). Interplay Between Structure and Interfacial Interactions in Fe‐Gd Synthetic Ferrimagnets. Advanced Electronic Materials, e00686.
NO ©2026 The Author(s).CT82/20-CT83/20PIE-20226AT018
NO Ministerio de Ciencia e Innovación (España)
NO Agencia Estatal de Investigación (España)
NO European Commission
NO Comunidad de Madrid
NO Universidad Complutense de Madrid
NO Banco Santander
NO Consejo Superior de Investigaciones Científicas (España)
DS Docta Complutense
RD 27 feb 2026