METHOD OF VISUALIZING AND TOPOGRAPHY OF MAGNETIC FIELDS

摘要

Usage: The invention relates to the field of magneto applied and can be used for imaging and holographic magnetic fields generated by magnetic particles, atoms contained, e.g., in paint coatings. SUMMARY: In an inhomogeneous magnetic field from its source 8 is placed bismuth iron garnet film 6 deposited on a transparent substrate of a nonmagnetic garnet 7. domain structure in a film 6 is observed by a polarization microscope in reflection mode. On the film 6 exposed to the alternating field of the coils 11 and the constant magnetic field from the solenoid 13. The total field strength of the external magnetic field does not exceed the saturation domain-floor film. External field is applied perpendicular to the film plane along its axis of easy magnetization. The frequency of the alternating magnetic field is selected by visual inspection in the range from 20 Hz to 4 v / P, where v - rate of the domain walls in the film, P - period of the domain structure in it, ZP 2 f-ly. (LS