الفهرس 
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Abstract
Faraday and Kerr magneto-optical methods have been used throughout present work to study the magnetic reversal process of ferromagnetic MnBi thin films. The specimens were prepared by vacuum deposition method of spec pure bismuth and manganese (99.99%). The process of condensation was followed by annealing process under high vacuum (=10-5Torr) and at temperature 250c for two hours.