MultiferroicMaterials alkanes AAO KPFM Granada PVAC oxide_layer INSP PolyimideFilm BFO Modulus BiVO4 #EC Chromium China Anneal Optoelectronic Transparent tip_bias_mode ForceVolumeMapping ScanningKelvinProbeMicroscopy Battery HexagonalBoronNitride HafniumDioxide ULCA Celebration TungstenDeposition BiFeO3 Ca10(PO4)6(OH)2 ShenYang MagneticArray Multiferroic_materials Piezoelectric GaAs AIN