Тип публикации: статья из журнала
Год издания: 2017
Идентификатор DOI: 10.1007/s10948-016-3885-4
Ключевые слова: CuO nanoparticles, Magnetic properties, Plasmachemical synthesis, Vibration magnetometer, Antiferromagnetism, Copper, Copper oxides, Electric discharges, Lanthanum compounds, Magnetism, Magnetometers, Nanomagnetics, Nanoparticles, Reflective coatings, Spin glass, Synthesis (chemical), X ray diffraction analysis, Antiferromagnetic orderings, Copper oxide nanoparticles, Ferromagnetic state, Narrow size distributions, Plasma arc discharge, Spin-glass behavior, SQUID magnetometers, Magnetoplasma
Аннотация: 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 vПоказать полностьюibration 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 ? 100 K). Meanwhile, some of the copper surface spins showed a spin-glass behavior at low temperatures. © 2016, Springer Science+Business Media New York.
Журнал: Journal of Superconductivity and Novel Magnetism
Выпуск журнала: Vol. 30, Is. 4
Номера страниц: 931-936