Memory switching of Fe2O3–BaO–V2O5 glasses

Effect of mixing transition ions in glasses. II. The P2O5–Fe2O3–MnO system

“…Though MTE was not observed, a sharp increase in resistivity was observed at a critical Fe concentration exactly as Mansour et al [7] and Doweidar et al [8] observed in BaO-V 2 O 5 -B 2 O 3 and Fe 2 O 3 -PbO-B 2 O 3 glasses, respectively. The sharp increase in resistivity has been explained by a Mott-Hubbard type MIT caused by the transition of relatively mobile SPs to practically immobile SBPs at a critical carrier concentration.…”

“…Recently, Mansour et al [7] and Doweidar et al [8] have reported sharp increases in resistivity in TI-containing glasses (TI-glasses) at critical carrier concentrations, typical of the glass systems investigated. The origin of such resistivity transition has not been extensively addressed by the authors.…”

“…Properties arising from the interaction between electrons or SPs are important in contemporary solid-state physics [4][5][6][7][8][9][10][11][12][13]. Several important phenomena such as superconductivity and giant/colossal magneto-resistivity (GMR/CMR) are explained by electron-electron correlation.…”

DC conductivity in single and mixed alkali vanadophosphate glasses

“…It may be that R in series (i) glasses is also increasing with Na 2 O content and that is why activation energies have increased. Increase in R with alkali content has been observed in barium vanadium borate [21] and sodium borate tungstate glasses [22]. The actual R values for the systems studied here have not been determined due to our lack of knowledge on a, C and m 0 which required to be substituted in the pre-exponential factor of Eqs.…”

Influence of Fe2O3 on the physical, structural and electrical properties of sodium lead borate glasses

“…Consequently, glasses containing Fe 2 O 3 are used in electrochemical, electronic, electro-optic and memory switching devices [18]. The addition of iron to borate glasses makes it electrically semiconducting and super paramagnetic [19].…”