First, {HEAD ~ a first topographic image} of {TAIL ~ the sample} undergoing magnetic effects is produced from the resonance frequency of a cantilever by FM detection 
of
First , { HEAD ~ a first topographic image } of { TAIL ~ the sample } undergoing magnetic effects is produced from the resonance frequency of a cantilever by FM detection
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH