Frequency dependent electrical conductivity and dielectric relaxation behavior in amorphous (90V2O5–10Bi2O3) oxide semiconductors doped with SrTiO3
作者： S Chakraborty , M Sadhukhan , B.K Chaudhuri , H Mori , H Sakata
DOI: 10.1016/S0254-0584(97)01937-8
关键词: Materials science 、 Mineralogy 、 Permittivity 、 Polaron 、 Seebeck coefficient 、 Dielectric 、 Conductivity 、 Amorphous solid 、 Doping 、 Strontium titanate 、 Condensed matter physics
摘要: Abstract We report on the experimental results of frequency dependent a.c. conductivity and dielectric constant SrTiO 3 doped 90V 2 O 5 –10Bi semiconducting oxide glasses for wide ranges (500–10 4 Hz) temperature (80–400 K). These show very large constants (10 –10 ) compared with that pure base glass (≈10 without exhibit Debye-type relaxation behavior. The increase in is considered to be due formation microcrystals TiO matrix. are n-type semiconductors as observed from measurements thermoelectric power. Unlike many vanadate glasses, Long's overlapping polaron tunnelling (OLPT) model found most appropriate fitting data, while undoped V –Bi correlated barrier hopping conduction mechanism valid. This change network structure caused by doping . power law behavior ( σ ac = A ω s x ).
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sci-hub.se 参考文章(30)
M. Sadhukhan, S. Chakraborty, D. K. Modak, B. K. Chaudhuri, Non-adiabatic small-polaron hopping conduction in SrTiO3-doped 90V2O5-10Bi2O3 glassy semiconductors Philosophical Magazine Part B. ,vol. 74, pp. 139- 153 ,(1996) , 10.1080/01418639608240332
K. Ramesh Chowdary, E. C. Subbarao, Liquid phase sintered BaTiO3 Ferroelectrics. ,vol. 37, pp. 689- 692 ,(1981) , 10.1080/00150198108223523
M. Pollak, T. H. Geballe, Low-Frequency Conductivity Due to Hopping Processes in Silicon Physical Review. ,vol. 122, pp. 1742- 1753 ,(1961) , 10.1103/PHYSREV.122.1742
Cheng-Fu Yang, Long Wu, Tien-Shou Wu, A new sintering agent for BaTiO3: the binary BaO-CuO system Journal of Materials Science Letters. ,vol. 11, pp. 1246- 1248 ,(1992) , 10.1007/BF00729781
M. Pollak, Temperature Dependence of ac Hopping Conductivity Physical Review. ,vol. 138, pp. 1822- ,(1965) , 10.1103/PHYSREV.138.A1822
Takashi Yamaguchi, Hiroko Ayaki, Lika Asai, Reaction of CaTiO3 with PbO-B2O3 and PbO-SiO2 glasses Journal of the American Ceramic Society. ,vol. 76, pp. 993- 997 ,(1993) , 10.1111/J.1151-2916.1993.TB05324.X
M. Pollak, On the frequency dependence of conductivity in amorphous solids Philosophical Magazine. ,vol. 23, pp. 519- 542 ,(1971) , 10.1080/14786437108216402
A.R. Long, Frequency-dependent loss in amorphous semiconductors Advances in Physics. ,vol. 31, pp. 553- 637 ,(1982) , 10.1080/00018738200101418
B.K. Chaudhuri, K. Chaudhuri, K.K. Som, Concentration and frequency dependences of A.C. conductivity and dielectric constant of iron-bismuth oxide glasses—II Journal of Physics and Chemistry of Solids. ,vol. 50, pp. 1149- 1155 ,(1989) , 10.1016/0022-3697(89)90024-3
L. Murawski, A.c. conductivity in binary V2O5-P2O5 glasses Philosophical Magazine Part B. ,vol. 50, ,(1984) , 10.1080/13642818408238888