I am trying to perform same experiment on my magnetic nanoparticles, but found some uncommon results in scanning in different directions. scanning from right to left and from left to right, we see a change in contrast of image, i.e. black and white. It seems like a shadow that appears all the time on all our particles. Can I ask how should I manage to solve the issue. more generally is it an artifact or this has a meaning and should be interpreted?
Karl Fabian
Did you calculate the interaction field between tip and sample? Is this large enough to switch your nanoparticles ?
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Marek Wojciech Gutowski
Maybe not necessarily switching but just rotation of nanoparticles - if they are free to move, naturally. Recall that MFM is Magnetic Force Microscopy.
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