Spectroscopic ellipsometry and x-ray diffraction are used to investigate the metal-insulator transition in V2O5 films. Below and above Tc no significant change in the (001) peak is observed, but both n and k spectra undergo remarkable changes over the entire photon energy range. The SE and XRD results indicate that the V2O5 film undergoes a MIT without a structural phase transition near 280 °C. Further the MIT is confirmed by measurement of the resistance with temperature.

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Magnesium alloys have been widely used in recent years as lightweight structural materials in the manufacturing of automobiles, airplanes, and portable computers. Magnesium alloys have extremely low density (as low as 1738 kg · m −3 ) and high rigidity, which makes them suitable for such applications. In this study, the thermal conductivity of two different magnesium alloys made by twin-roll casting was investigated using the laser-flash technique and differential scanning calorimetry for thermal diffusivity and specific heat capacity measurements, respectively. The thermal diffusivity of the magnesium alloys, AZ31 and AZ61, was measured over the temperature range from −125 • C to 400 • C. The alloys AZ31 and AZ61 are composed of magnesium, aluminum, and zinc. The thermal conductivity gradually increased with temperature. The densities of AZ31 and AZ61 were 1754 kg · m −3 and 1777 kg · m −3 , respectively. The thermal conductivity of AZ31 was about 25 % higher than that of AZ61, and this is attributed to the amount of precipitation.

Smart multifunctional V2O5 is an appealing oxide for energy–saving and energy–storage applications. This review article comprehensively analyzes the most recent advances and applications. The unique electronic structure of V2O5 with...

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