Transparent Tungsten Ferroelectric TungstenDeposition PetruPoni Step CastIron hard_disk HexagonalBoronNitride CHRYSALIS_INC Subhajjit FM_KPFM ForceVolumeMapping MultiferroicMaterials PolyStylene HACrystal OrganicSemiconductor Materials Vortex ScratchMode HighAcpectRatio AdhesionForce Wang MechanicalProperty HighAspect Temasek_Lab University_of_Regensburg HafniumDioxide BiasMode Device Neodymium Etch LMF MESA structure CaMnO3