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