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Functionalized magnetic composite nano/ microfibres with highly oriented van der Waals CrI3 inclusions by electrospinning

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Resumo:This study reports on the synthesis of highly oriented chromium triiodide (CrI3) magnetic inclusions inside nano/microfibres with a polyethylene oxide matrix, prepared by the electrospinning technique. The structural, microstructural and spectroscopic analysis shows uniformly dispersed CrI3 nanosized inclusions inside the fibres, presenting a C2/m monoclinic structure at room temperature, where their c-axis is perpendicular to the fibre mat plane and the ab layers are in-plane. Analysis of the magnetic properties show that the samples have a ferromagnetic-paramagnetic phase transition at ∼55-56 K, lower than that of bulk CrI3. Noticeably, a field-driven metamagnetic transition is observed below ∼45 K, from M versus H curves, when the applied magnetic field is perpendicular to the fibre mat plane, while it is strongly reduced when the field is in-plane. This anisotropic behaviour is attributed to the field-induced changes from antiferromagnetic to ferromagnetic interlayer magnetic moment alignment along the CrI3 c-axis stacked layers. These CrI3 electrospun fibres then show an efficient cost-effective route to synthesize magnetic composite fibres with highly oriented van der Walls inclusions, for spintronic applications, taking advantage of their anisotropic 2D layered materials properties.
Autores principais:Isfahani, Vahideh Bayzi
Outros Autores:Da Silva, João Filipe Horta Belo; Boddapati, Loukya; Rolo, Anabela G.; Baptista, Rosa Maria Ferreira; Deepak, Francis Leonard; De Araújo, João Pedro Esteves; de Matos Gomes, Etelvina; Almeida, B. G.
Assunto:Nano/microfibres Electrospinning 2D magnets Magnetic properties Spintronic CrI3 Functional systems
Ano:2021
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

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