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The influence of most physical factors on the revelation ability of magneto-optic eddy current defectoscopy of linear defects in metallic objects is investigated. Uniaxial anisotropy multi-component Bi-substituted garnet film is used as the sensor element. The efficiency of visualization depends on frequency and amplitude of the inducer’s electric current and the biasing magnetic field. Optimal values of these parameters are obtained. It is shown that the alternative magnetic field exerts the most influence on the eddy current magneto-optic image.

Layered high-coercive garnet films characterized by a couple of parameters very suitable for creating reconfigurable magnetic atomic traps with new properties are investigated. Non-uniform distribution of inner stresses and chemical composition stratification obtained in the films can be increased technologically to form sublayers for independent local switching by means of thermomagnetic recording. It makes possible to provide more than two magnetic states and create special types of atomic traps with additional "states of freedom". The experience in the films synthesis and experimental thermomagnetic recording for multilevel traps modeling is described.