caa a22 4500 38802240X CHVBK 20180307124928.0 cr unu---uuuuu 161130e199808 xx s 000 0 eng 10.1557/JMR.1998.0325 doi S0884291400045611 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0325 Nonlinear physical properties of some nonconventional semiconducting Bi-Pb-Ba-O glasses [Elektronische Daten] Semiconducting Bi1−xPbxBaO3−δ (or BPB) glasses with x = 0 to 0.8 have been prepared by fast quenching from the melt. Interesting anomalies in the temperature-dependent polaronic conductivity and dielectric constant have been observed in all these glass compositions at temperatures, Tp, varying from 310 to 330 K (depending on Pb concentration). This nonlinear behavior is considered to be associated with the local ordering or the displacements of the BiO3 type pyramidal structural units present in the glass matrix (observed from the infrared spectra of these glasses). This type of ordering/displacement gives rise to a local instability in the glass network structure which is also supported by the observed heat capacity anomaly around the same temperatures Tp. Copyright © Materials Research Society 1998 Modak D. K. Solid State Physics Department, Indian Association for the Cultivation of Science, Calcutta-700 032, India Banerjee G. Solid State Physics Department, Indian Association for the Cultivation of Science, Calcutta-700 032, India Karar M. Solid State Physics Department, Indian Association for the Cultivation of Science, Calcutta-700 032, India Sadhukhan M. Solid State Physics Department, Indian Association for the Cultivation of Science, Calcutta-700 032, India Bera A. K. Solid State Physics Department, Indian Association for the Cultivation of Science, Calcutta-700 032, India Chaudhuri B. K. Solid State Physics Department, Indian Association for the Cultivation of Science, Calcutta-700 032, India Pal P. K. Department of Physics, R.B.C. College, Naihati, West Bengal, India Journal of Materials Research Cambridge University Press 13/8(1998-08), 2328-2333 0884-2914 13:8<2328 1998 13 JMR https://doi.org/10.1557/JMR.1998.0325 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0325 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Modak D. K. Solid State Physics Department, Indian Association for the Cultivation of Science, Calcutta-700 032, India NATIONALLICENCE 700 1- Banerjee G. Solid State Physics Department, Indian Association for the Cultivation of Science, Calcutta-700 032, India NATIONALLICENCE 700 1- Karar M. Solid State Physics Department, Indian Association for the Cultivation of Science, Calcutta-700 032, India NATIONALLICENCE 700 1- Sadhukhan M. Solid State Physics Department, Indian Association for the Cultivation of Science, Calcutta-700 032, India NATIONALLICENCE 700 1- Bera A. K. Solid State Physics Department, Indian Association for the Cultivation of Science, Calcutta-700 032, India NATIONALLICENCE 700 1- Chaudhuri B. K. Solid State Physics Department, Indian Association for the Cultivation of Science, Calcutta-700 032, India NATIONALLICENCE 700 1- Pal P. K. Department of Physics, R.B.C. College, Naihati, West Bengal, India NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/8(1998-08), 2328-2333 0884-2914 13:8<2328 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge