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Structural and magnetic studies of CuO-TeO 2 and CuO-TeO 2 -B 2 O 3 glasses

Author

Listed:
  • F. Ciorcas

    (University of Aveiro)

  • S.K. Mendiratta

    (University of Aveiro)

  • I. Ardelean

    (Faculty of Physics, Babes-Bolyai University)

  • M.A. Valente

    (University of Aveiro)

Abstract

The glass systems xCuO . (1- x)TeO2 and xCuO . (1- x)[75TeO2 . 25B2O3] with 0 20 mol%, the Cu2+ ions are predominantly clustered and are coupled through antiferromagnetic exchange interaction. A comparative study of amorphous X-ray diffraction pattern of the glasses indicates a structural modification in the TeO2 network with increasing CuO concentration; the effect is quite visible in the samples with CuO concentrations higher than 20 mole percent. Measurements of density corroborate the conclusions drawn from the X-ray diffraction. Additionally, we show that our data validates a model in which CuO rich regions are surrounded by a buffer boundary which separates them from the tellurite glassy network; effect of introducing B2O3 can be best described as breaking these regions into smaller size regions.

Suggested Citation

  • F. Ciorcas & S.K. Mendiratta & I. Ardelean & M.A. Valente, 2001. "Structural and magnetic studies of CuO-TeO 2 and CuO-TeO 2 -B 2 O 3 glasses," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 20(2), pages 235-240, March.
    • Handle: RePEc:spr:eurphb:v:20:y:2001:i:2:d:10.1007_pl00022985
    DOI: 10.1007/PL00022985
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