Pode-se dizer também que esses objetos de qualidade estética, e por isso são corpora dos estudos contidos neste dossiê, objetos a que convencionamos chamar, quando ainda têm o formato parecido com o de um livro, de livros-objeto, alcançaram o grande objetivo dos estudiosos de literatura que, no ambiente tangencial, mas não exclusivo da formação de educadores, pedagogos, professores, sempre tiveram como sua ambi...
An energy-dispersive X-ray absorption spectroscopy beamline mainly dedicated to X-ray magnetic circular dichroism (XMCD) and material science under extreme conditions has been implemented in a bending-magnet port at the Brazilian Synchrotron Light Laboratory. Here the beamline technical characteristics are described, including the most important aspects of the mechanics, optical elements and detection set-up. T...
Tailoring the properties of magnetic vortices through the preparation of structured multilayers is discussed. The dependence of the vortex core radius r on the effective anisotropy is derived within a simple model, which agrees with our simulations. As the perpendicular anisotropy increases, r also increases until a perpendicular magnetization appears in the disk rim. Co/Pt multilayer disks were studied; x-ray ...
Agradecimentos: We thank S.G. Marchetti and J.F. Bengoa for sample preparation. SJS, SJAF, MBS, FGR thank CONICET, Argentina. SJS also thanks CBPF/MCT, Brazil. This work was partially supported by LNLS, Campinas, SP, Brazil (Proposal # D06A-DXAS # 4349/01), ANPCYT (under PICT # 06-17492) and Fundación Antorchas (Argentina); Abstract: ZnFe2O4 nanoparticles (6 nm) were synthesized by hydrothermal methods. Subsequ...
Agradecimentos: This work was supported by the Brazilian funding agencies: CNPq (project 470939/2003-6), FUNCAP and CAPES. The authors would like to thank the Laboratory of Electron Microscopy at Laboratório Nacional de Luz Síncrotron (LNLS) for the SEM measurements and Gelita for supplying the gelatin; Abstract: Dispersed nickel oxide nanoparticles were obtained by a simple and low-cost method using a mixture ...