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<p>CuO/Cu<sub>2</sub>O/Y<sub>2</sub>O<sub>3</sub>/Y<sub>2</sub>BaCuO/YBa<sub>2</sub>Cu<sub>3</sub>O<sub>6.32</sub> composite containing complex oxides was obtained by direct exposure of a powder mixture of Y<sub>2</sub>O<sub>3</sub>, BaO<sub>2</sub>, and CuO to pulsed high-voltage discharge plasma. Annealing this composite at 1173 K yielded a Y<sub>2</sub>BaCuO/CuO/YBa<sub>2</sub>Cu<sub>3</sub>O<sub>6.91</sub> composite containing the well-known high-temperature superconductor YBa<sub>2</sub>Cu<sub>3</sub>O<sub>6.91</sub>. The presence of a superconducting phase in the resulting composite at T &lt; 87 K was confirmed by data obtained on a vibromagnetometer. The NiCr<sub>2</sub>O<sub>4</sub>/NiO/Ni composite was obtained by plasma treatment of nichrome wire electrodes. The synthesized sample exhibited a shift in the magnetic hysteresis loop at low temperature, indicating the presence of ferromagnetic and antiferromagnetic regions in exchange interaction. A monolithic sample containing a Cu<sub>2</sub>O core coated with a CuO shell was obtained by plasma treatment of copper wire. The temperature dependence of the sample's magnetization was characteristic of high-temperature superconductivity. The used plasma-chemical methods are promising for research on the synthesis of new functional materials.</p>

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Synthesis of Complex Oxides Under the Influence of Air Plasma from a Pulsed High-voltage Discharge on a Mechanical Mixture of Simple Oxides and Metal Electrodes and Their Magnetic Properties

  • 期刊论文

  • 发表日期：

    2026年7月28日

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  • V. G. Kuryavyi,
  • I. A. Tkachenko,
  • A. V. Gerasimenko

摘要

CuO/Cu2O/Y2O3/Y2BaCuO/YBa2Cu3O6.32 composite containing complex oxides was obtained by direct exposure of a powder mixture of Y2O3, BaO2, and CuO to pulsed high-voltage discharge plasma. Annealing this composite at 1173 K yielded a Y2BaCuO/CuO/YBa2Cu3O6.91 composite containing the well-known high-temperature superconductor YBa2Cu3O6.91. The presence of a superconducting phase in the resulting composite at T < 87 K was confirmed by data obtained on a vibromagnetometer. The NiCr2O4/NiO/Ni composite was obtained by plasma treatment of nichrome wire electrodes. The synthesized sample exhibited a shift in the magnetic hysteresis loop at low temperature, indicating the presence of ferromagnetic and antiferromagnetic regions in exchange interaction. A monolithic sample containing a Cu2O core coated with a CuO shell was obtained by plasma treatment of copper wire. The temperature dependence of the sample's magnetization was characteristic of high-temperature superconductivity. The used plasma-chemical methods are promising for research on the synthesis of new functional materials.