В работе описано получение композитных покрытий, содержащих наночастицы магнетита, методом последовательной адсорбции из раствора. Показана возможность управления физическими свойствами таких нанокомпозитов путем варьирования числа циклов адсорбции магнитных наночастиц, а также проведен обзор возможных вариантов применения магнитных композитных материалов, основанных на их управляемых свойствах. Ключевые слова: наночастицы магнетита, нанокомпозитные покрытия, последовательная адсорбция, ферромагнитный резонанс, спектроскопия бриллюэновского светорассеяния.

The effect of ion irradiation on the magnetic properties of films of the ferromagnetic CoPt alloy made by the method of electron beam evaporation is investigated. It has been established that with an increase in the He+ ion fluence from 1×1013 to 1×1016 cm-2, a decrease in the coercive field and an increase in the planar component of the axis of easy magnetization are observed. Using magnetic force microscopy and Mandel'shtam-Brillouin spectroscopy, it was shown that with certain ion fluence (3 × 1014 cm-2), the formation of isolated round domains representing magnetic skyrmions is observed in the CoPt layer.

The possibilities of controlled exposure to ion irradiation (He+ with an energy of 20 keV and a fluence in the range from 3×1014 to 3×1015 cm–2) as a method for modifying the magnetic properties and domain structure of Co0.35Pt0.65 thin ferromagnetic films have been studied. It was found that the ion irradiation causes a change in the Dzyaloshinsky-Moriya interaction constant and a change in the skyrmion density that correlates with it. This result shows the possibility of homogeneous ion irradiation as a way to control the micromagnetic structure, namely the process of formation of skyrmion states.