Properties of Na_0.5Bi_0.5TiO₃-SrTiO₃ Ferroelectric Thin Films Prepared by a Modified MOSD Process

Abstract:

0.82NBT-0.18ST and 0.85NBT-0.15ST thin films have been prepared on Si substrates by a modified metalorganic solution deposition process. To achieve films with better ferroelectric properties, three main items have been changed in the process. Then the crystal structures, surface microstructures, hysteresis loops, fatigue curves and capacitance-voltage curves of the films were measured. It can be found that NBT-ST films can crystallize well after annealing at 650 °C for 5 minutes and have smooth surface microstructures. The 0.85NBT-0.15ST thin films exhibit better well-defined hysteresis loops than 0.82NBT-0.18ST, with a remnant polarization of 1.1 mC/cm² and a coercive fields of 44.2 kV/cm. The clockwise C-V curves show that they have a desired polarization-type switching mode. The memory window of 0.82NBT-0.18ST thin film is about 1.8V, and that of 0.85NBT-0.15ST thin film is about 2.5V.

• Periodical: Key Engineering Materials (Volume 744)
• Pages: 417-421
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.744.417
• Online since: July 2017
• Authors: Ya Ping Wang, Zhuo Wang*, Da Ji Li, Ya Nan Cui, Zhi Juan Li
• Keywords: Ferroelectric, Lead-Free, Metalorganic Solution Deposition, Thin Film

References

[1] K. Anjali, T. G. Ajithkumar, P. A. Joy, Correlations between structure, microstructure, density and dielectric properties of the lead-free ferroelectrics Bi0. 5(Na, K)0. 5TiO3, J. Adv. Dielect. 05 (2015) 1550028.

DOI: 10.1142/s2010135x15500289

[2] B. N. Raoa, A. Senyshynb, L. Olivic, V. Sathed, R. Ranjana, Maintaining local displacive disorders in Na0. 5Bi0. 5TiO3 piezoceramics by K0. 5Bi0. 5TiO3 substitution, J. Eur. Ceram. Soc. 36 (2016) 1961-(1972).

[3] K. Ch. Varada Rajulu, B. Tilak, K. Sambasiva Rao, Impedance spectroscopy study of BNKLT polycrystalline ceramic, Appl. Phys. A. 106 (2012) 533-543.

DOI: 10.1007/s00339-011-6631-6

[4] A. Rachakom, P. Jaiban, S. Jiansirisomboon, et al., Crystal structure and electrical properties of bismuth sodium titanate zirconate ceramics, Nanoscale Res. Lett. 7 (2012) 57.

DOI: 10.1186/1556-276x-7-57

[5] D. E. Jain Ruth, M. Muneeswaran, N. V. Giridharan, B. Sundarakannan, Properties of bismuth magnesium titanate substituted lead-free sodium bismuth titanate ceramics, J. Mater. Sci. Mater. Electron. 27 (2016) 7018-7023.

DOI: 10.1007/s10854-016-4658-3

[6] C. H. Yang, Q. Yao, H. Y. Guo, F. J. Geng, P. P. Lv, C. Feng, Abnormal dielectric behavior induced by defect dipoles in aged Na0. 5 Bi0. 5 (Ti, Zr)O3 thin film, Mater. Lett. 164 (2016) 380-383.

DOI: 10.1016/j.matlet.2015.11.021

[7] M. Cernea, L. Trupina, B. S. Vasile, R. Trusca, C. Chirila, Nanotubes of piezoelectric BNT–BT0. 08 obtained from sol–gel precursor, J. Nanopart. Res. 15 (2013) 1-7.

DOI: 10.1007/s11051-013-1787-y

[8] S. B. Anooz, J. Schwarzkopf, P. Petrik, M. Schmidbauer, A. Duk, E. Agocs, R. Fornari, Optical constants of MOCVD-grown Aurivillius phases in the Bi4Ti3O12–Na0. 5Bi0. 5TiO3 system measured by spectroscopic ellipsometry, Appl. Phys. A. 105 (2011).

DOI: 10.1007/s00339-011-6581-z

[9] Q. G. Chi, Y. Cui, Y. Chen, J. Q. Lin, X. Wang, Q. Q. Lei, Low temperature preparation and electric properties of highly (100)-oriented (Na0. 85K0. 15)0. 5Bi0. 5TiO3 thin films prepared by a sol–gel route, Ceram. Int. 42 (2016) 2497-2501.

DOI: 10.1016/j.ceramint.2015.10.050

[10] T Šetinc, M Spreitzer, Špela Kunej, Janez Kovač, Danilo Suvorov, Temperature stable dielectric behavior of sol–gel derived compositionally graded SrTiO3/Na0. 5Bi0. 5TiO3/SrTiO3 Thin Films, J. Am. Ceram. Soc. 96 (2013) 3511-3517.

DOI: 10.1111/jace.12519

[11] F. Remondiere, B. Malič, M. Kosec, J. P. Mercurio, Study of the crystallization pathway of Na0. 5Bi0. 5TiO3 thin films obtained by chemical solution deposition, J. Sol-Gel Sci. Technol. 46 (2008) 117-125.

DOI: 10.1007/s10971-008-1717-0

[12] J. Y. Xu, H. Z. Xu, Y. P. Wang, D. J. Li, Z. Wang, L. Zhen, The negative effect of non-NBT phase on the ferroelectric properties of Sr-doped NBT thin film and the solutions, Surf. Rev. Lett. 20 (2013) 1350012.

DOI: 10.1142/s0218625x13500121

[13] M. Zannen, M. Dietze, H. Khemakhem, M. Es-Souni, Ferroelectric (Na1/2Bi1/2)TiO3 thin films showing photoluminescence properties, Appl. Phys. A. 117 (2014) 1485-1490.

DOI: 10.1007/s00339-014-8581-2

[14] X. W. Jin, L. Lu, S. B. Mi, S. Cheng, M. Liu, C. L. Jia, Atomic scale investigation of planar defects in 0. 95Na0. 5Bi0. 5TiO3 -0. 05BaTiO3 thin films on SrTiO3 (001) substrates, J. Alloys Compd. 676 (2016) 173-180.

DOI: 10.1016/j.jallcom.2016.03.120

[15] M. M. Hejazi, A. Safeari, Temperature-dependent leakage current behavior of epitaxial Bi0. 5Na0. 5TiO3-based thin films made by pulsed laser deposition, J. Appl. Phys. 110 (2011) 90-95.

DOI: 10.1063/1.3660428

[16] K. Miriyala, R. Ramadura, Tunable ferroelectric domain orientation in polycrystalline and highly oriented Na0. 5 Bi0. 5TiO3 thin films, Mater. Lett. 178 (2016) 23-26.

DOI: 10.1016/j.matlet.2016.04.194

[17] H. Z. Xu, Y. P. Wang, D. J. Li, J. Y. Xu, Z. Wang, L. Zhen, Study of the non-NBT phase in Sr doped NBT thin films, Surf. Rew Lett. 20 (2013) 1350056.

DOI: 10.1142/s0218625x1350056x

[18] Y. P. Wang, Z. Wang, H. Z. Xu, D. J. Li, Properties of (1-x)Bi0. 5Na0. 5TiO3-xSrTiO3 ferroelectric thin films prepared by metalorganic solution deposition, J. Alloys Compd. 484 (2009) 230-232.

DOI: 10.1016/j.jallcom.2009.03.172

[19] D. Pérez-Mezcua, M. L. Calzada, I. Bretos, J. Ricote, et al. Influence of excesses of volatile elements on structure and composition of solution derived lead-free (Bi0. 50Na0. 50)1-x BaxTiO3 thin films, J. Eur. Ceram. Soc. 36 (2015) 89-100.

DOI: 10.1016/j.jeurceramsoc.2015.09.023