We report the preparation of (111) preferentially oriented CoFe2O4 thin films on Pt(111)/TiO2/SiO2/Si substrates using a spin-coating process. The post-annealing conditions and film thickness were varied for cobalt ferrite (CFO) thin films, and Pt/CFO/Pt structures were prepared to investigate the resistance switching behaviors. Our results showed that resistance switching without a forming pro...

1 Food Toxicology & Contaminants Departmnt, National Research Center, Dokki, Cairo, Egypt. 2 Nutrition Physiology and Toxicology Laboratory (NUTOX), INSERM U866, Bourgogne University, 1 Esplanade Erasme, F-21000 Dijon, France. 3 ProBioGem Laboratory, EA 1026, Polytech'Lille-IUT "A" Bd Paul Langevin, Villeneuve d'Ascq cedex, Université Lille Nord de France, France. 4 Food Science and Technology,...

Accurate scanning probing of magnetic materials at the nanoscale is essential for developing and characterizing magnetic nanostructures, yet quantitative analysis is difficult using the state of the art magnetic force microscopy, and has limited spatial resolution and sensitivity. In this communication, we develop a novel piezomagnetic force microscopy (PmFM) technique, with the imaging princip...

Taking inspiration from eukaryotic cilia, we report a method for growing dense arrays of magnetically actuated microscopic filaments. Fabricated from the bottom-up assembly of polymer-coated cobalt nanoparticles, each segmented filament measures approximately 5–15 mm in length and 23.5 nm in diameter, which was commensurate with the width of a single nanoparticle. A custom microscope stage actu...

The aim of this study is to evaluate the influence of pH on the synthesis of nanocrystallines cobalt ferrite by combination of sol- gel auto combustion and ultrasonic irradiation methods. Two different fuels, urea and thiourea, along with metal nitrates (oxidant) were used to prepare CoFe2O4 powders. The morphology of the resulting powders was investigated. The powders wer...

Lanthanum substituted Ni-Zn ferrite nanoparticles (Ni0.5Zn0.5LaxFe1-xO4; 0.00 ≤x≤ 1.00) synthesized by sol-gel method were presented. X-ray diffraction patterns reveal the typical single phase spinel cubic ferrite structure, with the traces of secondary phase for lanthanum substituted nanocrystals. In addition, the structural analysis also demonstrates that the average crystallite size varied i...

Chromium(III)-doped nickel–ferrite nanoparticles, with the general formula Ni0.5Co0.5CrxFe2−xO4 (x = 0.0, 0.10, and 0.20), were prepared by sol–gel method. The samples sintered at 700°C for 5 hr. XRD result showed that are in single-phase partially inverse cubic spinel ferrite structures space group Fd3m. From characterization, average crystallite size all decreased from 39.54 to 30.42 nm latti...

Nanomaterials are attracted a great deal of attention from scientific community due to its unique properties and applications. The small size ferrites have opened the door for intensive research to utilize their properties for biomedical applications. Cobalt ferrite nanomaterials and its silver doped (Ag-doped) nanocomposites have been prepared using solid state combustion method. This combusti...