Further Investigation on the Effects of Temperature and Energetic Ionizing Radiation on Monoclinic Zirconia Refractory

Elastic and Anelastic Properties of the Ceramics PbFe0.5Nb0.5O3: Anomalies NearTCandTN

“…The ferroelectric phase transition in this compound is the diffuse phase transition [2]. To analyze such kind of the phase transitions, the linear and quadratic Curie-Weiss laws are often applied to describe the temperature dependence of dielectric constant [8].…”

“…For this compound ferroelectricity arises below the Curie temperature of ∼383 K (due to the structural phase transition from the high-temperature cubic into the low-temperature rhombohedral phase) and antiferromagnetic spin ordering takes place below the Neel temperature of ∼143 K. There are a few reasons to consider PbFe 0.5 Nb 0.5 O 3 as rather interesting object for detailed investigation of the phase transitions by a study of elastic and anelastic behavior. First of all, it should be noted that the compound PbFe 0.5 Nb 0.5 O 3 belongs to solid solutions [2]. The phase transitions in such materials could be the diffuse phase transitions due to some fluctuations of composition.…”

Effect of Gamma Irradiation on the Structural, Optical, Electrical, and Ferroelectric Characterizations of Bismuth-Modified Barium Titanate Ceramics

“…Oxygen vacancies may have increased in the Bi:BT ceramics as a result of the production of displaced atoms by exposure to gamma-ray radiation. Thus, in ceramics exposed to radiation, an increase in oxygen vacancies could result from two mechanisms: dissociation of dipolar complexes that release oxygen vacancies and displacement of oxygen atoms at interstitial sites caused by Compton electron bombardment [58][59][60][61][62][63]. An oxygen vacancy would produce a deep or shallow donor energy level in the bandgap.…”

Pyroelectricity of Cd-doped telluride thin film

“…Normally, the current carriers in this material are of electronic and/or hole type. It is known that Hg/Cd and Te are weakly bound through intermetallic bonds, Thus, it was first suggested that the non-linearity in the 1-Vcurve of this compound is due to the space charge of unneutralized carriers [12] when a relatively high electric field (300 volts as a poling field) is applied. The non-linearity in I-V above 20 volts (Fig.…”