Impedance spectroscopy of V2O5–Bi2O3–BaTiO3 glass–ceramics

Dielectric response of Al-substituted multiferroic TbMnO3 at high temperatures

“…In particular, no arcs can be observed, whether in the low or in the high frequency range. The presence of a semicircle at low frequency is a characteristic of interfacial impedance, while at high frequency the semicircle results from a parallel combination of the bulk capacitance (C b ) and bulk resistance (R b ) of the material [33]. Note also that the semicircles show no inclined spur at low frequency, which normally is due to the electrode polarization.…”

“…This effect then leads to additional relaxation of the applied field. Therefore, the β parameter obtained from the modulus formalism and the frequency exponent parameter n obtained from the power law model represent the interaction between the charge carriers [33].…”

“…4 clearly show that there is only one type of relaxation behavior at the selected temperatures for both the undoped and the Al-doped samples (there is only one semicircle for each sample at each temperature). The presence of two semicircles (generally observed at low temperatures) in the low-and highfrequency regions indicates that there are two types of relaxation in each frequency region [33]. The two types of relaxation originate from the grain and grain boundaries' Maxwell-Wagner polarization effect (referred to as the internal barrier-layer capacitor [IBLC] low-frequency region) and the electrode-bulk interfacial Maxwell-Wagner polarization (highfrequency region).…”

Influence of Fe on Crystallization Behaviour and Electrical Conductivity of V2O5 ⋅ MoO3 ⋅ CdO ⋅ ZnO Glass Nanocomposite

“…In all batches, broadband appears at 3418 cm À 1 due to the presence of stretching vibrations of surface water [37] (Figure 3). The crystal structure of zinc vanadium oxide [ZnV 2 O 6 ] is built up from VO 5 groups bonded in a chain by common edges (V 2 O 2 units).…”

Electrical Conductivity Enhancement of V2O5-P2O5-Bi2O3 Glasses by Nanocrystallization

“…Glassy materials have many technological applications (fuel cells, new solid-state batteries, "smart windows", sensors) due to the large available composition ranges and inherent advantages. 1 Vanadium pentoxide (V 2 O 5 ) has interesting applications, such as optical switching devices, memory switching, and the electrical threshold, because of their thermal stability, relatively high electrical conductivity, and glass formation range compared to other transition metal oxide glasses. 2 Transition metal oxides such as P 2 O 5 , V 2 O 5 , etc.…”