Since the localized elements are quite thin, they may without difficulty be formed by photolithography in a small width and they are magnetized even for {HEAD ~ a very low value} of {TAIL ~ the rotating field} 
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Since the localized elements are quite thin , they may without difficulty be formed by photolithography in a small width and they are magnetized even for { HEAD ~ a very low value } of { TAIL ~ the rotating field }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL