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A Hall probe scanner has been developed capable of imaging both static and dynamic magnetic domains at the macroscopic scale. The technique is non-destructive and measures the perpendicular stray field component of magnetization associated with the small misalignment of magnetic domains with respect to the material's surface. The scanner has clearly demonstrated its capability to image magnetic domains under the surface coating of grain oriented electrical steel. Stroboscopic observations at magnetizing frequencies up to 100 Hz have yielded well defined domain images for high permeability grain oriented steel samples magnetized to 1.0 T. This technique now offers the possibility to study the magnetization dynamics in coated electrical steel which cannot be easily achieved with conventional imaging methods.
The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.