The Nanoscale World


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posted on Thu, Jan 12 2012 6:54 AM

Does anybody know when to use probes having high or low coercivity on magnetic samples?



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Jonathan replied on Thu, Jan 12 2012 10:29 AM

Depends on your sample and what you want to image! If your sample is easily magnetized (soft) you might not want to use hard magnetic tips, because you might switch your sample or write magnetically on it. It also depends what domains you want to measure. Imagine a hard magnetic sample and a soft magnetic tip. The tip will be immediately switched and the phase will change abruptly. That is not very helpful if you want to image domain walls (small changes of the magnetization vector) for example, but maybe useful for high domain contrast.  So choose wisely, depending on your sample and the results you want to obtain.

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replied on Fri, Jan 13 2012 2:52 AM

Thanks Jonathan. That's really helpful.


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Wilson replied on Fri, Nov 16 2012 2:49 PM


Do you a table which summarizes what/strength of the tip to be used for given samples with specific magnetic properties?

Thank you,


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