Using in-plane magnetic fields, Hummingbird Scientific’s magnetizing holder can apply up to +/- 900 Gauss* to the sample area. The system uses a built-in magnetic compensation circuit to limit the magnetic effect on the electron beam, increasing image quality and the maximum usable magnetic field (+/- 300 Oe*). The field is quantified and calibrated at the sample via a miniature field sensor.
Left: (Top) Graph illustrating the maximum applied magnetic field and the maximum field at which imaging is possible. (Bottom) Schematic showing the magnetic field lines for negative applied field. The magnetic compensation circuit guides the field around and applies an opposite field above and below the sample position. Colored image to the left shows FEA results of the magnetic fields at the sample.