Quantitative determination of magnetic fields on object surfaces via photoemission electron microscopy without restriction of the electron beam

摘要

The stray magnetic field of domains on the surface of Nd_(17)Fe_(17)Cu_5B_5 and SmFe_(10)Ti_(89) samples was visualized by emission electron microscopy in the regime without restriction of the electron rays by a contrast aperture. The distribution of the tangential and normal components of the magnetic field on the surface under study was derived from the image contrast. The experimental uncertainty of the performed quantitative measurements of the magnetic field is estimated as 15-20%, however, the applied technique has a principal error that is several times smaller.