Ananth Polyvinylidene_fluoride FM-KPFM plastic Lift SingleLayer LiftHeight ferromagnetic Growing HanyangUniv Current Photovoltaics neodymium_magnets SICM Al2O3 BCZT Aluminum NCM DIWafer Edwin Ca10(PO4)6(OH)2 Vacuum CuParticle LFM Co/Cr/Pt BaTiO3 Filter Wafer Monisha HardDisk Spain FrictionForce BiasMode Resistance Polyvinylidene