Сибирский федеральный университет

Тип публикации: статья из журнала (материалы конференций, опубликованные в журналах)

Конференция: Moscow International Symposium on Magnetism, MISM 2014; Moscow, Russian Federation; Moscow, Russian Federation

Год издания: 2015

Идентификатор DOI: 10.4028/www.scientific.net/SSP.233-234.542

Ключевые слова: Magnetic resonance, Nanocrystal, Superparamagnetic particles, Chromium compounds, Freezing, Magnetic moments, Nanoclusters, Nanocrystals, Resonance, Blocking temperature, Low-field resonances, Magnetic spinels, Nanocrystalline particle, Resonance field, Resonance spectrum, Wide frequency range, Magnetism

Аннотация: Nanoclusters and nanocrystals of the room temperature magnetic spinel CuCr2S4 synthesized using a facile solution-based method were examined by magnetic resonance in a wide frequency range 9.6?80 GHz and at temperatures down to 4.2 K. Decreasing of the resonance field and broadening of the resonance lines are found below ~ 50 K for both the nanocluster and nanocube samples due to the freezing of magnetic moments of nanocubes and nanocrystalline particles constituting nanoclusters. Additional blocking temperature Tb?300 K appears in nanoclusters due to the freezing of the magnetic moment of the entire cluster as a whole. Below this temperature, an additional low-field resonance line is found in the resonance spectra of nanoclusters at X-band. © (2015) Trans Tech Publications, Switzerland.

Журнал: Solid State Phenomena

Выпуск журнала: Vol. 233-234

Номера страниц: 542-545

• Pankrats A. (Siberian Federal University)
• Vorotynov A. (Kirensky Institute of Physics SB RAS)
• Tugarinov V. (Kirensky Institute of Physics SB RAS)
• Zharkov S. (Siberian Federal University)
• Abramova G. (Kirensky Institute of Physics SB RAS)
• Zeer G. (Siberian Federal University)
• Ramasamy K. (MINT Center, University of Alabama)
• Gupta A. (MINT Center, University of Alabama)

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