TY - JOUR
T1 - Effects of thickness on structures and electrical properties of Mn-doped K0.5Na0.5NbO3 films
AU - Wang, Lingyan
AU - Ren, Wei
AU - Shi, Peng
AU - Wu, Xiaoqing
AU - Yao, Xi
PY - 2014
Y1 - 2014
N2 - Lead-free ferroelectric Mn-doped K0.5Na0.5NbO 3 (KNN) films with different thicknesses were deposited on Pt(111)Ti/SiO2 /Si (100) substrates by a modified chemical solution deposition method. Single perovskite phase with (100)-texture was obtained in all films, whereas with the increase in thickness, the texture and morphologies were not dramatically changed. Dielectric and ferroelectric properties of KNN films were analyzed as a function of the thickness. It is found that the intrinsic and extrinsic contributions to the dielectric constant of KNN films are both increased. However, the dielectric constant of KNN films did not monotonously increase with the thickness increased. Eliminated the effect of leakage current of KNN film with the thickness of 0.65 lm, the coercive electric fields lowered and the remnant polarization of KNN films improved with increasing the thickness, indicating the improved ferroelectric properties of KNN films by increasing the thickness.
AB - Lead-free ferroelectric Mn-doped K0.5Na0.5NbO 3 (KNN) films with different thicknesses were deposited on Pt(111)Ti/SiO2 /Si (100) substrates by a modified chemical solution deposition method. Single perovskite phase with (100)-texture was obtained in all films, whereas with the increase in thickness, the texture and morphologies were not dramatically changed. Dielectric and ferroelectric properties of KNN films were analyzed as a function of the thickness. It is found that the intrinsic and extrinsic contributions to the dielectric constant of KNN films are both increased. However, the dielectric constant of KNN films did not monotonously increase with the thickness increased. Eliminated the effect of leakage current of KNN film with the thickness of 0.65 lm, the coercive electric fields lowered and the remnant polarization of KNN films improved with increasing the thickness, indicating the improved ferroelectric properties of KNN films by increasing the thickness.
KW - Coercive electric-field
KW - Dielectric constant
KW - Mn-doped KNN films
KW - Remnant polarization
KW - Thickness dependence
UR - https://www.scopus.com/pages/publications/84883895798
U2 - 10.1016/j.jallcom.2013.08.094
DO - 10.1016/j.jallcom.2013.08.094
M3 - 文章
AN - SCOPUS:84883895798
SN - 0925-8388
VL - 582
SP - 759
EP - 763
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -