Enhanced ferroelectric properties and energy storage density in PLZT/BNKT heterolayered thin films prepared by sol-gel methodNgo Duc Quan, Nguyen Van Hong, Tran Quoc Toan and Vu Ngoc HungEur. Phys. J. B, 91 12 (2018) 316DOI: https://doi.org/10.1140/epjb/e2018-90503-0