Mott Law exp(<i>T</i><sub>0</sub>/<i>T</i>)<sup>1/4</sup> and Scaling Properties of Oxygen Defect Tenorite CuO<sub>0.75</sub>
Listed in
This article is not in any list yet, why not save it to one of your lists.Abstract
The novel copper oxide CuO0.75 has been prepared by slow oxidation of Cu2O. The compound retains the original crystallographic structure of tenorite CuO, despite considerable presence of disordered oxygen vacancies. The CuO0.75 resembles mixed valence oxide Cu2+/Cu1+, while the unit cell contains one oxygen vacancy. Performance-wise, the electric resistivity and magnetic susceptibility data follow the Anderson-Mott localization theories. Exponential localization decay rate was found to be a –1 = 2.1 nm, in line with modern scaling theories. Magnetic double exchange interaction, mediated by oxygen vacancies, results, by cooling, in Zener conductivity at T~122 K, which is followed by antiferromagnetic transition at T~ 51 K. The obtained results indicate, the CuO0.75 compound can be perceived as showcase material for demonstration of new class of high performance paramagnetic materials.