The method 14, wherein each of the magnetic particles has {HEAD ~ an easy axis} parallel to {TAIL ~ a surface} of the substrate 
The method 14 , wherein each of the magnetic particles has { HEAD ~ an easy axis } parallel to { TAIL ~ a surface } of the substrate
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH