Single spin-torque vortex oscillator using combined bottom-up approach and e-beam lithography

A combined bottom-up assembly of electrodeposited nanowires and electron beam lithography technique has been developed to investigate the spin transfer torque and microwave emission on specially designed nanowires containing a single Co/Cu/Co pseudo spin valve. Microwave signals have been obtained even at zero magnetic field. Interestingly, high frequency vs. magnetic field tunability was demonstrated, in the range 0.4 - 2 MHz/Oe, depending on the orientation of the applied magnetic field relative to the magnetic layers of the pseudo spin valve. The frequency values and the emitted signal frequency as a function of the external magnetic field are in good quantitative agreement with the analytical vortex model as well as with micromagnetic simulations.Comment: 9 pages, 4 figure

Optical path difference behind of spectacular game of light

AbstractThis work reports, in a general frame concerning the scientific explanations of wonderful effects from the daily life, on the physical basis behind the colorful images observed at the surface of various transparent films. Accordingly, a deeper view inside of the related interference phenomena is provided, along with a new didactical approach. The concept of interference of light is developed and the optical path difference is introduced as a crucial parameter in explaining the formation of the interference patterns. Particularization is done in case of thin film interference, explaining so the spectacular game of colors on the surface of transparent films, observed in nature

Oxide/Metal/Oxide Transparent Electrodes for Plastic Electronics and Plastic Solar Cells

Date du colloque : 08/2012International audienc

A COMPARATIVE STUDY ON NEUROMOTOR DEVELOPMENT IN TWINS

Twins are a valuable source of observation, being considered a key instrument in scientific fields such as genetics, biology, or psychology. The literature suggests that the hereditary and environmental influences can be assessed by comparing twin partners. In this paper we have proposed to demonstrate the existence of differences in the neuromotor development of couples of monozygotic and dizygotic twins. In order to follow the infants’ evolution, we used the Peabody motor development scale, consisting of 6 subtests targeting archaic reflexes, locomotion, stationing, object manipulation, catching and visual-motor integration. Children were evaluated every month until the age of 1 year. The results obtained show that there are differences between monozygotic and dizygotic twins, which are highlighted by the development stages

Study of physical properties of some transparent oxides semiconductors obtained by thermal oxidation of metallic thin films

Date du colloque : 08/2013International audienc

On the properties of aluminium doped zinc oxide thin films deposited on plastic substrates from ceramic targets

We report on the deposition of Al doped ZnO (AZO) thin films on unheated polyethylene terephthalate (PET) substrates by pulsed laser deposition technique using a UV excimer laser and Al2O3:ZnO ceramic targets (1.5 and 2 wt% Al2O3). The deposited AZO films have been investigated by atomic force microscopy, scanning electron microscopy, X-ray diffraction, and optical spectrophotometry. Films present excellent optical and electrical properties (transmission in the visible range T > 85%; resistivity at room temperature rho = 1.3 x 10(-3) Omega cm) as electrodes for plastic solar cells. A good correlation was found between deposition conditions (laser fluence) and structural, morphological, optical and electrical propertie

Electrical and optical properties of Transparent Oxide/Metal/Oxide MultilayerFilms Deposited on Glass and PET substrates

Date du colloque : 10/2012International audienc

Magnetic Behavior of Co/Pt and TbCo Nanocaps Assembly for Bit Pattern Media

Large area patterning of self-assembled alumina nanobumps, with hexagonally close-packed order, has been used to create ordered array of bit pattern magnetic media. We have studied the magnetic properties of perpendicular magnetic TbCo alloy and Co/Pt multilayers deposited on self assembled alumina nanobumps. Measurement of reversal field as a function of field intensity, as well as magnetic force microscopy images confirm the weakness of exchange coupling between bits in the case of Co/Pt multilayer while stronger coupling is observed in the case of TbCo alloys. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3535

Magnetic Behavior of Co/Pt and TbCo Nanocaps Assembly for Bit Pattern Media

Large area patterning of self-assembled alumina nanobumps, with hexagonally close-packed order, has been used to create ordered array of bit pattern magnetic media. We have studied the magnetic properties of perpendicular magnetic TbCo alloy and Co/Pt multilayers deposited on self assembled alumina nanobumps. Measurement of reversal field as a function of field intensity, as well as magnetic force microscopy images confirm the weakness of exchange coupling between bits in the case of Co/Pt multilayer while stronger coupling is observed in the case of TbCo alloys. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3535