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Information × Registration Number 0209U002324, 0106U001819 , R & D reports Title Epitaxial garnet-ferrite films for magneto-optic defectoscopy popup.stage_title Head Berzhansky Vladimir N., Registration Date 06-02-2009 Organization Taurida National V.Vernadsky University popup.description2 Investigated object is epitaxial ferrite-garnet films (EFGF) having the domain structure period more than their thickness. Research purpose is synthesis of EFGF for magneto-optic transformers for nondestructive inspection of materials and articles. Main methods of investigations are: magneto-optic, inductive-frequency, ferromagnetic resonance, electron microscopy, X-ray diffraction. Experimental samples of films with high uniaxial magnetic anisotropy and domain structure period more than their thickness were synthesized. The physical properties dependence from melt composition and synthesis conditions were established. Main physical characteristics of EFGF are: specific Faraday rotation is 0,9 to 1.3°/mсm, domain structure period is 25 to 50 mcm, effective uniaxial magnetic anisotropy field is more than 240 kA/m, thickness is 3 to 5 mcm. Films are used in magneto-optic transformers to detect the hidden heterogeneous in metal constructions (flaws with size 10 mcm to few millimeters) during operativevisualization and magnetography. Possibilitiy of high-technology banknotes falsifications detection is demonstrated. It is shown that stable mono-domain areas ("clusters") arise in EFGF exposed by mechanical influences; their physical causes are surface relief and local decrease of perpendicular uniaxial anisotropy. To minimize consequences of mechanical influences uniaxial magnetic anisotropy is increased, compositions with near-zero magneto-striction are chosen and protective coverings are used. Application fields are: defectoscopy, criminalistics, magneto-electronics. Product Description popup.authors popup.nrat_date 2020-04-02 Close