Abstract
Preliminary STM experiments have been performed on a Fe polycrystal using a CoCr magnetic tip. With the usualW-tip, the Fe topography reveals a typical polycrystalline corrugation. The CoCr tip was obtained by cleaving a Si wafer covered with a CoCr film. Its operation was verified to be normal on a Cu single-crystal surface. The combination of Fe sample and CoCr tip leads to a strongly enhanced corrugation as compared to the normal topography. A preliminary explanation, in terms of force enhancement, is based on the interaction of the tip magnetic moment with the field gradient near the sample surface.
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Allenspach, R., Salemink, H., Bischof, A. et al. Tunneling experiments involving magnetic tip and magnetic sample. Z. Physik B - Condensed Matter 67, 125–128 (1987). https://doi.org/10.1007/BF01307314
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DOI: https://doi.org/10.1007/BF01307314