PtfeFilter BiFeO3 VinylAlcohol Co/Cr/Pt HighAcpectRatio Platinum NeodymiumMagnets FailureAnalysis ring shape PvdfBead InorganicCompound piezoelectric force microscopy Etch single_layer NTU EFM doped HighAspect TemperatureControlledAFM HighResolution Metal-organicComplex Chungnam_National_University Polytetrafluoroethylene polyvinyl acetate Anneal align Stiffness Ceramic Cobalt Yeditepe_University GranadaUniv Hair CaMnO3 HBN thermal_property