Discipline: Technology and Engineering
Subcategory: Electrical Engineering
Jordan Gatson - Norfolk State University
Co-Author(s): Amrit Sharma, Norfolk State University
Recently, ferroelectric thin films have attracted attention to the scientific community owing to fundamental scientific interest, and a wide range of useful properties. Lead-free barium calcium titanate (BCT) and barium zirconium titanate (BZT) thin films were grown by pulsed laser deposition (PLD) technique. This technique has emerged as one of the most popular and intrinsically simple techniques for depositing a wide range of the most exciting materials being explored for next-generation applications. The thin films of BCT and BZT were deposited at 800℃ under an oxygen pressure of 20 mTorr, with an excimer laser (KrF, 248 nm) of energy density ~2.5 J/cm2 and a pulse rate of 5 Hz. X-ray diffraction θ-2θ scans showed highly oriented diffraction peaks from the substrate. The atomic force microscopy (AFM) studies revealed that the surfaces of all the thin films are observed to be smooth and homogeneous, free of microcracks, pores or holes. These thin films exhibit ferroelectric hysteresis with large saturation polarization and low remnant polarization which may be useful for high energy storage applications.
Funder Acknowledgement(s): This work is supported by the NSF-CREST Grant number HRD 1036494 and NSF-CREST Grant number HRD 1547771.
Faculty Advisor: Messaoud Bahoura, email@example.com
Role: I just recently got moved onto this project due to the previous one not being sufficient.