Abstract
The dc conductivity of the glasses in the Fe2O3-Bi2O3-K2B4O7 system was studied at temperatures between 223 and 393 K. At temperatures from 300 to 223 K, T−1/4 (T is temperature) dependence of the conductivity was found, however, both Mott variable-range hopping and Greaves intermediate range hopping models are found to be applicable. Mott and Greaves parameters analysis gave the density of states at Fermi level N (EF) = 3.13 × 1020–21.01 × 1020 and 1.93 × 1021–16.39 × 1021 cm−3eV−1 at 240 K, respectively. The variable-range hopping conduction occurred in the temperature range T = 300–223 K, since WD was found to be large (WD = 0.08–0.14 eV for these glasses) and dominated the conduction at T < 300 K.
Similar content being viewed by others
References
M. SAYER and A. MANSHINGH, Phys. Rev. B6 (1972) 4629.
A. AL-SHAHRANI, A. AL-HAJRY and M. M. EL-DESOKY, Phys. Stat. Sol. (a) 300 (2003) 378.
H. H. QIU, M. KUDO and H. SAKATA, Mater. Chem. Phys.51 (1997) 233.
M. M. EL-DESOKY, J. Mater. Sci.: Mater. Electr. 14 (2003) 215.
M. M. EL-DESOKY and I. KASHIF, Phys. Stat. Sol. (a) 194(1) (2002) 89.
M. M. EL-DESOKY, Phys. Stat. Sol. (a) 195(2) (2003) 422.
M. M. EL-DESOKY, Mater. Chem. Phys. 73 (2002) 259.
T. HIRASHIMA and F. TANAKA, Seramikkusu Ronbunshi97 (1989) 1150.
K. TANAKA, T. YOKO, N. NAKANO, M. NAKAMURA and K. KAMIYA, J. Non-Cryst. Solids125 (1990) 264.
S. NAKAMURA and N. ICHINOSE, Jpn. J. Appl. Phys.28 (1989) 984.
S. NAKAMURA and N. ICHINOSE, J. Non-Cryst. Solids95/96 (1987) 849.
N. F. MOTT, J. Non-Cryst. Solids1 (1968) 1.
I. G. AUSTIN and N. F. MOTT, Adv. Phys.18 (1969) 41.
N. F. MOTT, Philos. Mag.19 (1969) 41.
H. H. QIU, T. ITO and H. SAKATA, Mater. Chem. Phys.58 (1999) 3230.
G. N. GREAVES, J. Non-Crsyt. Solids11 (1973) 427.
H. SAKATA, K. SEGA and B. K. CHAUDHURI, Phys. Rev. B 5 (1999) 2330.
H. MORI, K. GOTOH and H. SAKATA, J. Non-Cryst. Solids183 (1995) 122.
V. K. DHAWAN, A. MANSINGH and M. SAYER, J. Non-Cryst. Solids51 (1982) 87.
A. GHOSH and B. K. CHAUDHURI, J. Non-Cryst. Solids83 (1986) 151.
A. GHOSH, J. Appl. Phys.66(6) (1989) 2425.
E. MANSOUR, G. M. EL-DAMARAWI, Y. M. MOUSTAFA, S. ABD EL-MAKSOUD and H. DOWEIDAR, Physica B293 (2001) 268.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
El-Desoky, M.M., Al-Shahrani, A. Variable—Range hopping in Fe2O3-Bi2O3-K2B4O7 glasses. J Mater Sci: Mater Electron 16, 221–224 (2005). https://doi.org/10.1007/s10854-005-0771-4
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s10854-005-0771-4