VerticalPFM PhthalocyaninePraseodymium cooling LateralPFM IndiumTinOxide Microchannel fluoroaalkane ChemicalCompound Hysteresys VortexCore Inorganic_Compound HardDisk PANI BaTiO3 MagneticForceMicroscopy sputter LDPE Array InorganicCompound rubber NeodymiumMagnets MfmPhase Crystal DomainSwitching PUR SThM chemical_compound Chemical_Vapor_Deposition NUS_NNI_Nanocore MoS2 Sapphire PinpointPFM Optic fifber tip_bias_mode