Gong Leakage Polyvinylidene vertical_PFM electrospinning Annealed MultiferroicMaterials 2-vinylpyridine Formamidinium_lead_iodide Ito STM Inorganic_Compound Pipette Nanostructure ring shape Austenite SSRM HardDiskMedia C36H74 Hexacontane heterojunctions conductive FAPbI3 NeodymiumMagnets PetruPoni non_contact MetalCompound DomainSwitching CntFilm thermal_property University_of_Regensburg Phosphide Genetic Ram Subhajjit