Синтез і магнітні характеристики кристалічних наночастинок твердих розчинів (Fe1-xZnx)Fe2O4

• Дата: 2016
• Автори: Gorbyk, P. P., Dubrovin, I. V., Abramov, M. V.
• Формат: Стаття
• Мова: Українська
• Опубліковано: Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine 2016
• Теми: методика Ельмора; гідротермальна рекристалізація; цинковий ферит; петля гістерезису; намагніченість насичення
• Онлайн доступ: https://www.cpts.com.ua/index.php/cpts/article/view/373
• Назва журналу: Chemistry, Physics and Technology of Surface

We have synthesized a material consisting of nanoparticles of (Fe1-xZnx)Fe2O4 solid solution by the modified Elmore method. To prevent agglomeration of particles, we have used a procedure that includes injection of an inert soluble salt (as a component of the mixture of precursors) in the reaction zone. Magnetic moment hysteresis loops have been measured using a laboratory vibrating sample magnetometer of Foner type at room temperature. Demagnetized nanoparticles of solid solutions have been used as test specimens. The mean size of the synthesized nanoparticles is about 16 nm. This result is in agreement with the values calculated with the use of diffraction peak widths and the SEM data. The fabrication of single-domain particles (of about 40 nm in diameter) and controlling their sizes have been accomplished by a method of hydrothermal recrystallization in the solution directly after the synthesis in the microwave oven of 1.4 kW in power. It has been found that the nanodisperse materials with specified (in a certain range) values of specific saturation magnetization and coercive force can be obtained by increasing the content of zinc in solid solutions of Fe3O4 – ZnFe2O4 system.