Abstract
We have studied anisotropic electrical conductivity and dielectric properties of a LiTaO3 crystal in the temperature range 290–900 K. The anisotropy in its dielectric characteristics is associated with specific features of dielectric relaxation in the polar and nonpolar directions of the crystal. In the temperature range 290–450 K, the electrical conductivity in a nonpolar direction slightly exceeds that in the polar direction and there is anisotropy in electron mobility μe. At temperatures from 600 to 900 K, conductivity anisotropy shows up in both the magnitude of conductivity and the energetic and kinetic characteristics of charge transport processes.
Similar content being viewed by others
References
Lines, M.E. and Glass, A.M., Principles and Application of Ferroelectrics and Related Materials, Oxford: Clarendon, 1977, p. 680.
Volk, T.R. and Wöhlecke, M., Lithium niobate. Defects, photorefraction and ferroelectric switching, Berlin: Springer, 2008.
Ferroelectric Crystals for Photonic Applications, Ferraro, P. Berlin: Springer, 2009.
Sinclair, D.C. and West, A.R., Electrical properties of a LiTaO3 single crystal, Phys. Rev. B: Condens. Matter Mater. Phys., 1989, vol. 39, pp. 13 486–13 492.
Ishibashi, K., Okuyama, Y., Kurita, N., and Fukatsu, N., Dissolution of hydrogen into LiTaO3, J. Jpn. Inst. Met., 2011, vol. 75, pp. 229–234.
Wang, Q., Leng, S., and Yu, Y., Activation energy of small polarons and conductivity in LiNbO3 and LiTaO3 crystals, Phys. Stat. Solidi B, 1996, vol. 194, pp. 661–665.
Gopalan, V. and Gupta, M., Observation of internal field in LiTaO3 single crystals: its origin and time–temperature dependence, Appl. Phys. Lett., 1996, vol. 68, pp. 888–890.
Bhaumik, I., Ganesamoorthy, S., Bhatt, R., Wadhavan, V., Gupta, P., Kumaragurubaran, S., Kitamura, K., Takekava, S., and Nakamura, M., Dielectric and ac conductivity studies on undoped and MgO-doped near-stoichiometric lithium tantalate crystals, J. Appl. Phys., 2008, vol. 103, paper 074106.
Ming, D., Reau, J., Ravez, J., Gitae, J., and Hagenmuller, P., Impedance spectroscopy analysis of LiTaO3 type single crystal, J. Solid State Chem., 1995, vol. 116, pp. 185–192.
Avakyan, E.M., Belabaev, K.G., and Shuvalov, L.A., Effects of photon energy and temperature on the photoelectric properties of reduce LiTaO3 crystals, Kristallografiya, 1983, vol. 28, pp. 1150–1153.
Evdokimov, S.V., Pritulenko, A.S., Sapiga, A.A., and Yatsenko, A.V., An experimental setup for measuring the impedance of dielectrics at low and ultralow frequencies, Uch. Zap. Tavrichesk. Nats. Univ. im. V.I. Vernadskogo. Ser. Fiz.-Mat. Nauki, 2011, vol. 24, no. 2, pp. 187–192.
Maeda, M., Suzuki, I., and Sakiyama, K., Humidity dependence of surface resistances of LiNbO3 and LiTaO3 single crystals, J. Appl. Phys., 1992, vol. 31, pp. 3229–3231.
Gonsález, R. and Chen, Y., Transport of hydrogenic species in crystalline oxides: radiation and electricfield-enhanced diffusion, J. Phys.: Condens. Matter, 2002, vol. 14, pp. R1143–R1173.
Kushibiki, J., Takanaga, I., Arakawa, M., and Sannomiya, T., Accurate measurements of the acoustical physical constants of LiNbO3 and LiTaO3 single crystals, IEEE Trans. Ultrason., Ferroelectr. Frequency Control, 1999, vol. 46, pp. 1315–1323.
Physics of Electrolytes, Hladik, J., London: Academic, 1972.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © M.N. Palatnikov, V.A. Sandler, A.V. Yatsenko, N.V. Sidorov, S.V. Evdokimov, O.V. Makarova, 2015, published in Neorganicheskie Materialy, 2015, Vol. 51, No. 7, pp. 752–762.
Rights and permissions
About this article
Cite this article
Palatnikov, M.N., Sandler, V.A., Yatsenko, A.V. et al. Anisotropic electrical conductivity and dielectric properties of LiTaO3 crystals in the temperature range 290–900 K. Inorg Mater 51, 685–695 (2015). https://doi.org/10.1134/S0020168515070122
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0020168515070122