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Showing 1 to 16 of 16 for “"CoFe2O4"”.
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Colloidal CoFe2O4-based nanoparticles for Magnetic Fluid Hyperthermia
In the field of biomedicine, important issues to address are the early-stage diagnosis and targeted therapies. Since the last two decades, magnetic nanoparticles have been proposed as potentially powerful due to their unique chemical-physical properties. Magnetic nanoparticles can be applied in a …
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Growth of spinel oxide thin films for high efficiency room temperature spin filtering
… non-magnetic electrode in an almost defect-free CoFe2O4-based spin-filter tunnel junction has been explored. For this purpose, high-quality spinel LiTi2O4 and CoFe2O4 thin films have been deposited by pulsed laser deposition on MgAl2O4 substrates. Both films were extensively characterised in …
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Voltage Control of Magnetism in Novel Structured Vertically Aligned Nanocomposite Thin Films
… moment saturation (mS) and coercivity (HC) in CoFe2O4 nanopillars through voltage-induced oxygen ion migration. Notably, a rapid response time and high endurance were achieved, surpassing other magneto-ionic systems. Magnetoelectric systems exhibit a strain coupling between magnetic and …
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Two phase magnetoelectric epitaxial composite thin films
… structures were observed in both BaTiO3-CoFe2O4 and BiFeO3-CoFe2O4 systems: by changing the orientation of substrates or annealing condition, the nano-pillar structure could be changed into nano-belts structure. By doing so, the anisotropy of ferromagnetic properties changes accordingly. …
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Investigation of co1-2xnixmnxceyfe2-yo4 double-substitution spinel for highly efficient detection of flammable and hazardous liquefied petroleum gas: sensing performance
… following the appropriate substitution were CoFe2O4 (dried naturally), CoFe2O4 (dried with Infrared lamp), Co0.8Ni0.1Mn0.1Fe1.9Ce0.1O4, Co0.6Ni0.2Mn0.2Fe1.8Ce0.2O4, and Co0.8Ni0.1Mn0.1Fe1.9Ce0.1O4 spinel ferrites. X-ray diffractometry (XRD), high resolution transmission electron micrographs …
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Templated Multiferroic Nanocomposites by Ion-Lithography
… ferroelectric BiFeO3 (BFO) and ferrimagnetic CoFe2O4 (CFO) could grow epitaxially on [001]-SrTiO3 substrate, forming BFO matrix and CFO pillars. In this thesis, we focus on three things: First, the possibility of integrating perovskite on garnet Gd3Ga5O12 (GGG) substrate is explored. …
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Vertically and Horizontally Self-assembled Magnetoelectric Heterostructures with Enhanced Properties for Reconfigurable Electronics
… devices and logic devices. Firstly, a BiFeO3-CoFe2O4 (BFO-CFO) heterostructure was epitaxially deposited on Pb(Mg1/3Nb2/3) O3-x at%PbTiO3 (PMN-xPT). The resulting PMN-xPT was proven to have a large piezoelectric effect capable of boosting the CME in the heterostructure to create a much higher …
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Tratamento hidrotermal de nanopartículas de ferrita de cobalto : propriedades morfológicas, estruturais e magnéticas
… físicas e magnéticas de ferrita de cobalto (CoFe2O4). As amostras estudadas foram sintetizadas pelo método de coprecipitação química em meio aquoso e após esse processo, foi realizado um tratamento térmico nas temperaturas de 100, 120, 150 e 200 ºC. O intervalo de tempo foi de duas horas para …
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Magnetoelectric Thin Film Heterostructures and Electric Field Manipulation of Magnetization
… iron-gallium (Fe-Ga) or cobalt ferrite (CoFe2o4 or CFO) films on top of differently-oriented ferroelectric PMN-PT substrates. Through significant electric field-induced strain in the piezoelectric substrate, the magnetic remanence and coercive field, as well as the magnetization direction …
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A Micromechanics Study on Ferroelectrics and Multiferroic Composites
… studied. For the linear case, a popular BaTiO3-CoFe2O4 system is studied with different connectivity and aspect ratio. The effective physical properties of overall composites analyzed by the Mori-Tanaka method. The results shown that the magnetoelectric coupling coefficients 𝛼<sub>11</sub> and …
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Surface Acoustic Waves Propagation and Coupling Fields in Piezomagnetic and Piezoelectric Semiconductor Layered Structures
… same initial stress, the phase velocity of CdSe/CoFe2O4 is much smaller than that of ZnO/CoFe2O4, and the attenuation is also much weaker. (4) The SH waves regulation in PM/PS layered structure by rotation and biasing electric field is studied. The dispersion, attenuation characteristics and …
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Structure-Property Relations on Strain-Mediated Multiferroic Heterostructures
… neutron diffraction spectroscopy under E. Then, CoFe2O4(CFO)/tetragonal BFO nanocomposites were successfully fabricated on top of (001)-oriented LaAlO3 single crystal substrates. The surface morphology, crystal structure, magnetic properties, and ME effects were evaluated and compared with …
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Nanostructured BaTiO3 Thin Films for Enhanced Photoresponse
… into the ferroelectric matrix. BTO/CoFe2O4 (CFO) composite films with controllable composition were successfully synthesized. The transmission electron microscopy revealed a homogeneous structure, which has not been reported in perovskite/spinel material systems. Ferroelectricity was …
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Magnetoelectric Effect in Ferroelectric-Ferromagnetic Heterostructures
… First, we generated self-assembled BiFeO3-CoFe2O4 (BFO-CFO) nanostructures of varying architectural structures on differently-oriented perovskite substrates. We were able to control aspect ratio through both thickness control and by manipulating growth thermodynamics. The relationship …
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Multiferroic BiFeO3 films and nanostructures for hybrid energy harvesters
… conditions allows the deposition of BiFeO3-CoFe2O4 nanocomposite thin-films in a single step MOCVD process.
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Magnetoelectric Composites for On-Chip Near-Resonance Applications
… nanocomposite arrays [Pb1.1(Zr0.6Ti0.4)O3/CoFe2O4] with controlled grain orientation were developed and investigated by a novel hybrid deposition method. The influence of the pre-deposited template film orientation on the growth of ME composite array was studied. (2) PZT/CFO/PZT thick …