Investigation of the Magnetic-Impedance Properties of CuO Nanoparticles Obtained in a Low-Pressure Arc Discharge Plasma

IF 1.1 4区物理与天体物理 Q4 PHYSICS, APPLIED

Technical Physics Pub Date : 2024-09-27 DOI:10.1134/S106378422407048X

A. V. Ushackov, L. Yu. Fedorov

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Abstract

CuO nanoparticles obtained in a low-pressure arc discharge plasma followed by annealing in an oxygen atmosphere at 500°C were studied by X-ray diffraction and transmission electron microscopy. The formation of irregularly shaped nanoparticles in the size range of 5–30 nm was found. The Rietveld refinement confirmed the formation of a monoclinic CuO phase with an average crystallite size of ~21 nm. The temperature dependences of the magnetization and permittivity of CuO nanoparticles have been studied. They show antiferromagnetic behavior with a Neel temperature of 230 K and frequency-dependent dispersion behavior in the temperature range of 100–200 K at an external magnetic field induction of 0–1.3 T. The dielectric relaxation mechanism is analyzed and found to follow the Arrhenius behavior. It is shown that hopping conductivity with a variable hop length more accurately describes charge transport in CuO nanoparticles. A magnetodielectric response of about 2.5 was observed at a frequency of 12 kHz at a temperature of 150 K in a magnetic field of 1.3 T.

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研究在低压电弧放电等离子体中获得的氧化铜纳米粒子的磁感应特性

通过 X 射线衍射和透射电子显微镜研究了在低压电弧放电等离子体中获得的氧化铜纳米粒子，然后在 500°C 氧气环境中进行退火。结果发现，形成的纳米颗粒形状不规则，大小在 5-30 纳米之间。里特维尔德细化证实形成了平均结晶尺寸约为 21 纳米的单斜 CuO 相。对氧化铜纳米粒子的磁化率和介电常数的温度依赖性进行了研究。研究分析了介电弛豫机制，发现其遵循阿伦尼乌斯行为。结果表明，具有可变跳长的跳电导率能更准确地描述 CuO 纳米粒子中的电荷传输。在温度为 150 K、磁场为 1.3 T、频率为 12 kHz 时，观察到了约 2.5 的磁介电响应。

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来源期刊

Technical Physics 物理-物理：应用

CiteScore

1.30

自引率

14.30%

发文量

139

审稿时长

3-6 weeks

期刊介绍： Technical Physics is a journal that contains practical information on all aspects of applied physics, especially instrumentation and measurement techniques. Particular emphasis is put on plasma physics and related fields such as studies of charged particles in electromagnetic fields, synchrotron radiation, electron and ion beams, gas lasers and discharges. Other journal topics are the properties of condensed matter, including semiconductors, superconductors, gases, liquids, and different materials.