نتایج جستجو برای: cobalt ferrite nano particles
تعداد نتایج: 235403 فیلتر نتایج به سال:
The OER activity of cobalt ferrite nanoparticles depends on the degree Co redox and its change in coordination.
sio2-coated cobalt ferrite (cofe2o4) nanoparticles were obtained by the hydrolysis of tetraethylorthosilicate in the presence of cofe2o4 nanoparticles in co-precipitation. the effects of sio2coating on the magnetic properties of cofe2o4 nanoparticles were investigated. the structural, morphological and magnetic properties of as-prepared sample were characterization by x-ray diffraction (xrd), f...
The temperature dependence of core loss in cobalt substituted Ni-Zn-Cu ferrites was investigated. Co ions are known to lead to a compensation of the magnetocrystalline anisotropy in Ni-Zn ferrites, at a temperature depending on the cobalt content and the Ni / Zn ratio. We observed similar behaviour in Ni-Zn-Cu and it was found that the core loss goes through a minimum around this magneto-crysta...
For spintronic devices excited by a sudden magnetic or optical perturbation, the torque acting on the magnetization plays a key role in its precession and damping. However, the torque itself can be a dynamical quantity via the time-dependent anisotropies of the system. A challenging problem for applications is then to disentangle the relative importance of various sources of anisotropies in the...
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...
In this research CoxMn1-xFe2O4 nano particles (0 ≤ x≤ 0.7), using high purity metal nitrates and citric acid have been prepared by sol gel auto combustion method. The obtained powders were characterized by XRD, FT – IR, SEM and VSM analysis. The XRD patterns showed that the formed crystallites were all in the cubic single phase and the formed crystallite belongs to the space group Fd3m and aver...
the presented study aimed at investigating the effect of foliar application of amino acids and nano particles and chelated iron on photosynthetic pigments and yield of potato. to this end a factorial experiment was carried out in the form of randomized complete block design with three replications in 2013, in the research field of natural resources institute in damavand, iran. the first factor ...
In this research magnetic nanoparticles of cobalt–zinc ferrite (Co1-xZnxFe2O4, x=0, 0.2, 0.4, 0.6, 0.8), have been synthesized by the coprecipitation method, using stable ferric, zinc and cobalt salts with sodium hydroxide, at 80 ˚C. Phase formation and the morphology of the resulting nanoparticles were studied by X-ray diffraction and transmission electron microscopy respectively. Mean crystal...
Nano size lithium ferrite was prepared through aerosol route and characterized using TEM, XRD, magnetic measurements and Mössbauer spectroscopy. The particle size of as obtained samples were found to be ~10 nm through TEM, that increases upto ~80 nm on annealing at 1200 C. The unit cell parameter ‘a’ calculated using XRD, confirms the formation of α-LiFe5O8. Room temperature Mössbauer spectra o...
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,...
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