An-Najah Blogs :: An-Najah Blogs :: en-us Mon, 26 Oct 2020 14:10:52 IST Mon, 26 Oct 2020 14:10:52 IST Ferromagnetic thin film mageto-resistive transducers ArticlesThe magnetoresistive MR effect has been known for more than 100 years but only recently it has been developed and exploited in thin film ferromagnetc films These developments have led to the wider application of MR transducersProcess and apparatus for detection of electrically conductive materials - Coin validation system ArticlesThe magneto resistive effect has been known for over 100 years but only in recent years has been exploited in magnetic thin film for the retrieval of information in magnetic tapes discs drums and bubble devices The present patent is however concerned wit the use of the magneto resistive detectors for the identification and validation of coins and or materials an application which has not been reported in the literature A versatile high magnification Magnification Kerr magneto-optic microscope ArticlesA versatile high magnification Kerr magneto-optic microscope and measuring electronic system has been developed from a design based on a single objective lens An analogue to digital signal recovery system enabled measurements of the surface magnetization levels to be obtained at high magnification on well defined areas of less than 4 m X 4 m on optically imperfect surfaces Use of the equipment in the transverse polar or longitudinal mode is possible and its application to dynamic magnetization measurements for example in bubble domain propagation elements and static domain wall structure is described Comparison of the magnetization distribution in NI-FE in I- Bars of differing dimensions ArticlesResult as are presented of the magnetization distribution in real size NI-FE bubble overlay I- Bars of differing dimensions and for various in plan applied rotating fields In addition measurements have bee made of the approach to saturation at the center of the I-bars The results are compared with previous experimental and theoretical results all of which indicate that the magnetization within the bars are strongly influenced by the demagnetization effects An investigation of the magnetization distribution and magnetization processes in symmetrical 90⁰ NI-FE chevron Elements ArticlesA high magnification Kerr magneto optic microscope and ferro fluid techniques have been used to investigate the magnetization distributions and domain patterns on 90⁰ Chevron elements under rotating applied field conditions Considerable magnetic interactions have been observed to exist between the magnetization levels in the orthogonal legs of the chevrons The magnitude of the interaction effects are dependant upon the orientation of the applied field relative to the legs of the chevron