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Infrared, Raman spectroscopy and ac magnetic susceptibility of Gd2O3-TeO2-V2O5 glasses

Y. B. SADDEEK1, I. S.YAHIA2,* , W. DOBROWOLSKI3, L. KILANSKI3, N. ROMČEVIĆ4, M. ARCISZEWSKA4

Affiliation

  1. Department of Physics, Faculty of Science, Al-Azhar University, Assiut, Egypt
  2. Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt
  3. Institute of Physics, Polish Academy of Sciences, Al. Lotnikow, 32/46, 02-668 Warszawa, Poland
  4. Institute of Physics, Pregrevica 118, 11080 Belgrade, Serbia

Abstract

In this paper, we present a characterization of the local structure and magnetic properties of the glassy system xGd2O3- 65 TeO2–(35−x)V2O5–(x = 2.5, 5, 7.5 mol %) using IR and Raman on one hand, and ac magnetic susceptibility measurements on the other hand. Analysis of IR and Raman spectroscopy indicates to the presence of four main bands attributed to the structural units [TeO3], [TeO4], [VO4], and [VO5], respectively. The presence of gadolinium cations in the glass structure leads to the appearance of a structural ordering process around the vanadium atoms as well as to a decrease in the number of linked tellurium polyhedra. Thus, it can be said that Gd+3 may significantly modify the Te–O network. The ac magnetic susceptibility, the magnetic moment and the Curie temperature, the molecular field constant of these materials were investigated in a temperature range of 4–200K. The reciprocal of the molar magnetic susceptibilities of all samples appear to obey Curie–Weiss law in the paramagnetic region.

Keywords

Tellurite glasses, IR and Raman spectroscopy, Ac magnetic susceptibility.

Citation

Y. B. SADDEEK, I. S.YAHIA, W. DOBROWOLSKI, L. KILANSKI, N. ROMČEVIĆ, M. ARCISZEWSKA, Infrared, Raman spectroscopy and ac magnetic susceptibility of Gd2O3-TeO2-V2O5 glasses, Optoelectronics and Advanced Materials - Rapid Communications, 3, 6, June 2009, pp.559-564 (2009).

Submitted at: May 15, 2009

Accepted at: June 15, 2009