Open AccessМорфология и магнитные свойства полых сфер Co-=SUB=-3-=/SUB=-O-=SUB=-4-=/SUB=-
Author(s) -
А. В. Дмитриев,
Е. В. Владимирова,
А.П. Есаулков,
В. Д. Журавлев,
М. В. Кузнецов,
С. А. Упоров
Publication year - 2020
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2020.12.50294.173
Subject(s) - gas pycnometer , materials science , x ray photoelectron spectroscopy , magnetization , raman spectroscopy , scanning electron microscope , nanocrystal , diffraction , analytical chemistry (journal) , transmission electron microscopy , spheres , sorption , spray pyrolysis , crystallography , chemical engineering , nanotechnology , magnetic field , porosity , composite material , chemistry , optics , thin film , physics , chromatography , quantum mechanics , astronomy , adsorption , engineering
Nanostructured hollow spheres of Co3O4 were synthesized by ultrasonic spray pyrolysis. Nanocrystals forming the structure of spheres differ in size and packing density, depending on the synthesis conditions. The samples were certified by X-ray diffraction, scanning electron microscopy, low-temperature nitrogen sorption, vacuum pycnometry, Raman and XPS spectroscopy. The field and temperature dependences of the magnetization showed that the size and packing density of nanocrystals determine the magnetic characteristics and the Néel temperature of hollow Co3O4 spheres.