Mott Law exp(<i>T</i><sub>0</sub>/<i>T</i>)<sup>1/4</sup> and Scaling Properties of the Oxygen-Deficient Tenorite CuO<sub>0.75</sub>
The novel sub-stoichiometric copper oxide CuO<sub>0.75</sub> was prepared via the slow oxidation of Cu<sub>2</sub>O. This compound retains the original crystallographic structure of tenorite CuO, despite the considerable presence of disordered oxygen vacancies. CuO<sub>...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-06-01
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| Series: | Condensed Matter |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2410-3896/10/2/33 |
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| Summary: | The novel sub-stoichiometric copper oxide CuO<sub>0.75</sub> was prepared via the slow oxidation of Cu<sub>2</sub>O. This compound retains the original crystallographic structure of tenorite CuO, despite the considerable presence of disordered oxygen vacancies. CuO<sub>0.75</sub> resembles the mixed valence oxide Cu<sup>2+</sup>/Cu<sup>1+</sup>, while the unit cell contains one oxygen vacancy. Performance-wise, the electric resistivity and magnetic susceptibility data follow the Anderson–Mott localization theories. The exponential localization decay length was found to be α<sup>−1</sup> = 2.1 nm, in line with modern scaling research. Via cooling, magnetic double-exchange interaction, mediated by oxygen, results in Zener conductivity at <i>T</i>~122 K, which is followed by antiferromagnetic transition at <i>T</i>~51 K. The obtained results indicate that the CuO<sub>0.75</sub> compound can be perceived as a showcase material for the demonstration of a new class of high-performance magnetic materials. |
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| ISSN: | 2410-3896 |