Maxwell–Wagner relaxation in CaCu3Ti4O12/Ag composites
作者： C.C. Wang , Y.J. Yan , L.W. Zhang , M.Y. Cui , G.L. Xie
DOI: 10.1016/J.SCRIPTAMAT.2005.12.047
关键词:
摘要: CaCu3Ti4O12/Ag composites with different Ag weight fractions were prepared by sintering thoroughly mixed CaCu3Ti4O12 and Ag2O powders at 1050 °C in air. The samples found to consist of Ag-deficient insulating surface layers Ag-rich more conductive inner parts. Dielectric measurements reveal that, apart from the distinct dielectric features for pure CaCu3Ti4O12, another relaxation appears near room temperature. This has been interpreted based on Maxwell–Wagner model due discontinuity charge concentration across interface between layers.
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J. B. Neaton, David Vanderbilt, Lixin He, Morrel H. Cohen, Extrinsic models for the dielectric response of CaCu3Ti4O12 Journal of Applied Physics. ,vol. 94, pp. 3299- 3306 ,(2003) , 10.1063/1.1595708
Can Wang, Q. F. Fang, Z. G. Zhu, Enhanced dielectric properties of low-temperature sintered SrBi2Nb2O9/Ag composites Applied Physics Letters. ,vol. 80, pp. 3578- 3580 ,(2002) , 10.1063/1.1477616
Derek C. Sinclair, Timothy B. Adams, Finlay D. Morrison, Anthony R. West, CaCu3Ti4O12: One-step internal barrier layer capacitor Applied Physics Letters. ,vol. 80, pp. 2153- 2155 ,(2002) , 10.1063/1.1463211
D. Capsoni, M. Bini, V. Massarotti, G. Chiodelli, M.C. Mozzatic, C.B. Azzoni, Role of doping and CuO segregation in improving the giant permittivity of CaCu3Ti4O12 Journal of Solid State Chemistry. ,vol. 177, pp. 4494- 4500 ,(2004) , 10.1016/J.JSSC.2004.09.009
P. R. Apte, R. Pinto, A. G. Chourey, S. P. Pai, Surface resistance, residual losses, and granularity in Ag‐doped YBa2Cu3O7−δ thin films Journal of Applied Physics. ,vol. 75, pp. 4258- 4260 ,(1994) , 10.1063/1.355965
Rajiv K. Singh, D. Bhattacharya, P. Tiwari, J. Narayan, C. B. Lee, Improvement in the properties of high Tc films fabricated in situ by laser ablation of YBa2Cu3O7‐Ag targets Applied Physics Letters. ,vol. 60, pp. 255- 257 ,(1992) , 10.1063/1.106954
T.B. Adams, D.C. Sinclair, A.R. West, Giant Barrier Layer Capacitance Effects in CaCu3Ti4O12 Ceramics Advanced Materials. ,vol. 14, pp. 1321- 1323 ,(2002) , 10.1002/1521-4095(20020916)14:18<1321::AID-ADMA1321>3.0.CO;2-P
L. Ganapathi, Ashok Kumar, J. Narayan, Properties of YBa2Cu3AgxO7−δ composite superconductors Journal of Applied Physics. ,vol. 66, pp. 5935- 5939 ,(1989) , 10.1063/1.343619
Sung-Yoon Chung, Il-Doo Kim, Suk-Joong L. Kang, Strong nonlinear current–voltage behaviour in perovskite-derivative calcium copper titanate Nature Materials. ,vol. 3, pp. 774- 778 ,(2004) , 10.1038/NMAT1238
A.P Ramirez, M.A Subramanian, M Gardel, G Blumberg, D Li, T Vogt, S.M Shapiro, Giant dielectric constant response in a copper-titanate Solid State Communications. ,vol. 115, pp. 217- 220 ,(2000) , 10.1016/S0038-1098(00)00182-4