Ferromagnetism on an atom-thick & extended 2D metal-organic coordination network

Lobo-Checa, Jorge ; Hernández-López, Leyre ; Otrokov, Mikhail M. ; Piquero-Zulaica, Ignacio ; Candia, Adriana E. ; Gargiani, Pierluigi ; Serrate, David ; Delgado, Fernando ; Valvidares, Manuel ; Cerdá, Jorge ; Arnau, Andrés ; Bartolomé, Fernando

Resumen: Ferromagnetism is the collective alignment of atomic spins that retain a net magnetic moment below the Curie temperature, even in the absence of external magnetic fields. Reducing this fundamental property into strictly two-dimensions was proposed in metal-organic coordination networks, but thus far has eluded experimental realization. In this work, we demonstrate that extended, cooperative ferromagnetism is feasible in an atomically thin two-dimensional metal-organic coordination network, despite only ≈ 5% of the monolayer being composed of Fe atoms. The resulting ferromagnetic state exhibits an out-of-plane easy-axis square-like hysteresis loop with large coercive fields over 2 Tesla, significant magnetic anisotropy, and persists up to TC ≈ 35 K. These properties are driven by exchange interactions mainly mediated by the molecular linkers. Our findings resolve a two decade search for ferromagnetism in two-dimensional metal-organic coordination networks.

Idioma: Inglés

DOI: 10.1038/s41467-024-46115-z

Año: 2024

Publicado en: Nature communications 15, 1 (2024), 1858 [8 pp.]
ISSN: 2041-1723

Financiación: info:eu-repo/grantAgreement/ES/AEI/PID2019-107338RB-C64
Financiación: info:eu-repo/grantAgreement/ES/DGA/E12-20R
Financiación: info:eu-repo/grantAgreement/ES/DGA/E13-20R
Financiación: info:eu-repo/grantAgreement/EUR/INTERREG V-A/EFA 194-16-TNSI
Financiación: info:eu-repo/grantAgreement/ES/MICINN-AEI/PRTR-C17.I1
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2019-103910GB-I00
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2020-115159GB-I00
Financiación: info:eu-repo/grantAgreement/ES/MINECO/RED2018-102833-T

Tipo y forma: Artículo (Versión definitiva)