Hybrid organic/inorganic interface: in situ and ex situ characterization in terms of structure, morphology, electronic and magnetic properties

Author(s)

Annese, E. ; Mori, T. J. A. ; Schio, P. ; Salles, B. Rache ; Cezar, J. C.

• Document type: Journal article
• Source: Journal of Magnetism and Magnetic Materials; v. 584, p. 8-pg., 2023-10-15.

Abstract

Organic conjugated molecules are promising media to host spin-polarized carriers, due to their weak spin relaxation mechanisms. Here, we fabricated a metal-hybrid organic-inorganic complex oxide heterostructure made of Fe-Phthalocyanine (FePc): Co(0.5 nm)/FePc(0; 0.5; 1 nm)/La0.67Sr0.33MnO3/SrTiO3 and investigated the interface structure and chemical bonding, and overall magnetic properties. Details about the Co/FePc and FePc/LSMO interfaces were obtained through X-ray photoelectron and absorption characterizations. The combined in-situ and ex-situ magnetic measurements of the heterostructure indicates the contribution of FePc and Co moments to the overall magnetic response. Moreover, these measurements indicate that the LSMO bulk magnetic properties were not canceled out by the surface treatment, but favored the formation of a magnetic dead layer. The hybrid heterostructure presents a modification of the saturation magnetization attributed to the contribution of the molecular layer. The present results are a step forward in the engineering of hybrid organic/inorganic interfaces. (AU)

• FAPESP's process: 15/12312-2 - Engineering organic molecular lms for spintronics applications
• Grantee: Júlio Criginski Cezar
• Support Opportunities: Research Grants - Visiting Researcher Grant - International
• FAPESP's process: 12/51198-2 - Growth and characterization of the electronic structure of oxides multiferroics heterostructures
• Grantee: Júlio Criginski Cezar
• Support Opportunities: Research Grants - Young Investigators Grants