DC electrical conductivity of semiconducting cobalt-phosphate glasses

作者：Tawati Daefalla M^*; Adlan M Jamel Basha; Abdullah Mat Johar

来源：Journal of Non-Crystalline Solids, 2011, 357(10): 2152-2155.

DOI：10.1016/j.jnoncrysol.2011.02.011

• Low temperature of TMO glasses
• Semiconducting glasses
• TMO glasses
• Phosphate glasses

The dc conductivity of semiconducting cobalt-phosphate glasses has been measured at temperatures ranging from 213 to 530 K. Four bulk samples of CoO-P(2)O(5) glasses of different compositions were produced by melting dry mixtures of analytical reagent grades of CoO and P(2)O(5) at temperatures between 1200-1250 degrees C for 2 h using a press-quenching method from glass melt. Samples were annealed at 400 degrees C for 1 h. The dc conductivity was found to be dependent on the CoO content in the glass. At temperatures from 213 to 444 K. however, both Mott's variable-range hopping (VRH) and the Greaves' intermediate range hopping models are found to be applicable. VRH at this range of temperatures is attributed to large values of the disorder energy of these glasses.

• 出版日期2011-5-1