Repositório Digital

A- A A+

On the structural and chemical characteristics of Co/Al2O3/ graphene interfaces for graphene spintronic devices

.

On the structural and chemical characteristics of Co/Al2O3/ graphene interfaces for graphene spintronic devices

Mostrar registro completo

Estatísticas

Título On the structural and chemical characteristics of Co/Al2O3/ graphene interfaces for graphene spintronic devices
Autor Canto, B.
Gouvêa, Cristol de Paiva
Archanjo, Braulio Soares
Schmidt, Joao Edgar
Baptista, Daniel Lorscheitter
Abstract We report a detailed investigation of the structural and chemical characteristics of thin evaporated Al2O3 tunnel barriers of variable thickness grown onto single-layer graphene sheets. Advanced electron microscopy and spectrum-imaging techniques were used to investigate the Co/Al2O3/ graphene/SiO2 interfaces. Direct observation of pinhole contacts was achieved using FIB crosssectional lamellas. Spatially resolved EDX spectrum profiles confirmed the presence of direct point contacts between the Co layer and the graphene. The high surface diffusion properties of graphene led to cluster-like Al2O3 film growth, limiting the minimal possible thickness for complete barrier coverage onto graphene surfaces using standard Al evaporation methods. The results indicate a minimum thickness of nominally 3 nm Al2O3, resulting in a 0.6 nm rms rough film with a maximum thickness reaching 5 nm.
Contido em Scientific reports. London. Vol. 5 (Sept. 2015), 14332, 7 p.
Assunto Grafeno
Microscopia eletronica
Spin
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/142446
Arquivos Descrição Formato
000987205.pdf (1.162Mb) Texto completo Adobe PDF Visualizar/abrir

Este item está licenciado na Creative Commons License

Este item aparece na(s) seguinte(s) coleção(ões)


Mostrar registro completo

Percorrer



  • O autor é titular dos direitos autorais dos documentos disponíveis neste repositório e é vedada, nos termos da lei, a comercialização de qualquer espécie sem sua autorização prévia.
    Projeto gráfico elaborado pelo Caixola - Clube de Criação Fabico/UFRGS Powered by DSpace software, Version 1.8.1.