Galfenol margarine biocompatible Conductive AFM Iron LeakageCurrent neodymium_magnets MembraneFilter ring shape GaN fifber KevlarFiber Vanadate OrganicCompound mechanical_property YttriaStabilizedZirconia Mechanical CompactDisk MBE ScanningSpreadingResistanceMicroscopy Self-assembledMonolayer hard_disk_media gallium_nitride BismuthFerrite Metal Tin sulfide Fujian PFM Alkane Tapping LowDensityPolyethylene SelfAssembly MonoLayer UTEM Stiffness