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Information × Registration Number 0211U004683, 0109U002431 , R & D reports Title Mono-crystalline magneto-optic media for atomic chips and thermo-magnetic writing of data popup.stage_title Head Berzhansky Vladimir N., Registration Date 16-02-2011 Organization Taurida National V.I. Vernadsky University popup.description2 The aim of the work - synthesis of mono-crystalline magneto-optic active media (epitaxial ferrite-garnet films) for reconfigurable atomic chips and thermo-magnetic recording. Main methods of investigations - magneto-optic, selective chemical and ion-beam etching, electron microscopy, energy-dispersive microanalysis, X-ray diffraction. Apparatus: magneto-polarimeter, scanning electron microscope equipped with energy dispersive spectrometer, polarizing microscope, interference microscope, double-channel spectrophotometer, X-ray diffractometer. By means of liquid phase epitaxy method experimental samples of high-coercive ferrite-garnet films for use in atomic traps (coercivity more than 6 kA/m, Curie temperature about 200 grad.C) and thermo-magnetic recording devices (coercivity more than 4,8 kA/m, Curie temperature 60-70 grad.C) have been synthesized and investigated. In particular, pronounced layered films manifested in redistribution of chemical composition along their crystallizing front and non-homogeneity of magnetic properties along their thickness were grown. The composition stratification can be used in multilayer atomic traps. The existence of a several localizing levels of trapped atoms in the same bias field was confirmed by the computer simulation. The principle possibility of independent (layer-by-layer) thermo-magnetic recording at two levels was demonstrated experimentally on the model of focused laser beam thermo-magnetic recording equipment. Using selective etching method the films morphology was investigated; non-uniform distribution of dislocations along the films thickness and its dependence on the value of film-substrate crystalline lattice mismatch was revealed. On this basis the conclusion about the existence of limits of thermo-magnetic recording space resolution, and, as a consequence, about degree of localizing atom clouds in magnetic traps. Applications: magneto-electronics, nanotechnology, atom optics, defectoscopy, magnetic data carriers control, forensic investigations. Product Description popup.authors Вишневський Віктор Георгійович Каравайніков Андрій Вікторович Мілюкова Олена Татосівна Недвіга Олександр Степанович Нестерук Олександр Григорович Прокопов Анатолій Романович Рак Ирина Федорівна Шапошніков Олександр Миколайович Шумілов Олексій Генійович popup.nrat_date 2020-04-02 Close