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

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, Magnetic properties, Magnetism, Magnetometers, Nanomagnetics, Nanoparticles, Reflective coatings, Spin glass, Synthesis (chemical), X ray diffraction analysis, Antiferromagnetic orderings, Copper oxide nanoparticles, CuO 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 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 ? 100 K). Meanwhile, some of the copper surface spins showed a spin-glass behavior at low temperatures. © 2016, Springer Science+Business Media New York.

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Издание

Журнал: Journal of Superconductivity and Novel Magnetism

Выпуск журнала: Vol. 30, Is. 4

Номера страниц: 931-936

ISSN журнала: 15571939

Авторы

  • Lepeshev A.A. (Russian Acad Sci, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk, Russia; Siberian Fed Univ, Krasnoyarsk 660074, Russia)
  • Karpov I.V. (Russian Acad Sci, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk, Russia; Siberian Fed Univ, Krasnoyarsk 660074, Russia)
  • Ushakov A.V. (Russian Acad Sci, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk, Russia; Siberian Fed Univ, Krasnoyarsk 660074, Russia)
  • Balaev D.A. (Siberian Fed Univ, Krasnoyarsk 660074, Russia; LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia)
  • Krasikov A.A. (LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia)
  • Dubrovskiy A.A. (LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia)
  • Velikanov D.A. (LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia)
  • Petrov M.I. (Russian Acad Sci, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk, Russia; LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia)

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