SingleCrystal PiezoelectricForceMicroscopy StyreneBeads FrequencyModulation Fe_film SThM Metal PrCurve IRDetector Hole Yeditepe Copper high_resolution MagneticArray Plug NiFe chemical_compound Grain molecular_self_assembly DOE PFM Silver ring shape Magnetic CeramicCapacitor DataStorage Spain Tungsten_disulfide Crystal AIN Wafer EFMAmplitude NeodymiumMagnets Yttria_stabilized_Zirconia Mfm