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