Preparation and property of Ba0.77Sr0.23TiO3 ferroelectric thin films on flexible mica substrate
A method of preparing Ba0.77Sr0.23TiO3(BST)ferroelectric thin film on the flexible mica substrate by pulsed laser deposition(PLD)was introduced,and the microstructure and electrical properties of thin film were investigated.It was found that the prepared flexible BST films exhibited a single-crystal structure with(111)orientation and average roughness of only 1.96 nm.The residual polarization(2Pr)and maximum polarization(2Pmax)were tested as 6.46 μC/cm2 and 17.8 μC/cm2,respectively,demonstrating excellent ferroelectric property.After 1011 bipolar switching cycles,the BST film still exhibited good ferroelectric properties.Subsequently,the linear fitting analysis of the I-V curves were carried out and the conduction mechanism of BST film was revealed.As the electric field strength increased,the conduction mechanism changed from the ohmic contact mechanism to the space charge limited current(SCLC)effect mechanism.This study can provide a new way to prepare flexible nonvolatile storage devices.
pulsed laser depositionflexible micaBa0.77Sr0.23TiO3ferroelectric thin film
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