Particularities of the Magnetic State of CuO Nanoparticles Produced by Low-Pressure Plasma Arc Discharge

被引：32

作者：

Lepeshev, A. A. ^{[1
,2
]}

Karpov, I. V. ^{[1
,2
]}

Ushakov, A. V. ^{[1
,2
]}

Balaev, D. A. ^{[2
,3
]}

Krasikov, A. A. ^{[3
]}

Dubrovskiy, A. A. ^{[3
]}

Velikanov, D. A. ^{[3
]}

Petrov, M. I. ^{[1
,3
]}

机构：

[1] Russian Acad Sci, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk, Russia

[2] Siberian Fed Univ, Krasnoyarsk 660074, Russia

[3] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2017年 / 30卷 / 04期

基金：

俄罗斯科学基金会;

关键词：

CuO nanoparticles; Plasmachemical synthesis; Magnetic properties; Vibration magnetometer; PLASMACHEMICAL SYNTHESIS; OXIDE; TEMPERATURE;

D O I：

10.1007/s10948-016-3885-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Copper oxide nanoparticles were produced by direct plasmachemical synthesis in a plasma arc discharge of low pressure. The formation of CuO nanoparticles with an average size of 12 nm and narrow size distribution intervals was determined by using the x-ray diffraction analysis and TEM microscopy methods. It was defined by using a vibration magnetometer and a SQUID magnetometer, that the magnetic properties of CuO nanoparticles with such size were extremely different from the magnetic properties of bulk antiferromagnetic CuO. Structural defects caused the formation of a ferromagnetic state, remaining at least up to the room temperature. The temperature of corresponding antiferromagnetic ordering was significantly decreased (down to similar to 100 K). Meanwhile, some of the copper surface spins showed a spin-glass behavior at low temperatures.

引用

页码：931 / 936

页数：6

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