A(001)-oriented NaNbO_(3)-LaCoO_(3):Mn thin film with enhanced ferroelectric properties was successfully deposited on a SrRuO_(3)-buffered LaAlO_(3) substrate by radiofrequency magnetron sputtering.This epitaxial thin...A(001)-oriented NaNbO_(3)-LaCoO_(3):Mn thin film with enhanced ferroelectric properties was successfully deposited on a SrRuO_(3)-buffered LaAlO_(3) substrate by radiofrequency magnetron sputtering.This epitaxial thin film modified by element doping shows a tetragonal ferroelectric structure and large remanent polarization(31μC cm^(-2))with high Curie temperature(450℃).The polarization fatigue tests demonstrate an improved fatigue resistance due to the reduced oxygen vacancies by element doping.Further X-ray absorption spectra experiments found that the split energy between Nb t2g and eg orbitals is reduced and the hybridization between transition metal d-O 2p is strengthened,leading to enhanced ferroelectric polarization.展开更多
基金supported by National Key R&D Program of China(2020YFA0406202)National Natural Science Foundation of China(22090042 and 21731001)。
文摘A(001)-oriented NaNbO_(3)-LaCoO_(3):Mn thin film with enhanced ferroelectric properties was successfully deposited on a SrRuO_(3)-buffered LaAlO_(3) substrate by radiofrequency magnetron sputtering.This epitaxial thin film modified by element doping shows a tetragonal ferroelectric structure and large remanent polarization(31μC cm^(-2))with high Curie temperature(450℃).The polarization fatigue tests demonstrate an improved fatigue resistance due to the reduced oxygen vacancies by element doping.Further X-ray absorption spectra experiments found that the split energy between Nb t2g and eg orbitals is reduced and the hybridization between transition metal d-O 2p is strengthened,leading to enhanced ferroelectric polarization.
