Open AccessМагнитные свойства нанокристаллов Bi-=SUB=-1-x-=/SUB=-Ca-=SUB=-x-=/SUB=-FeO-=SUB=-3-delta-=/SUB=-
Author(s) -
Н. А. Ломанова,
М. В. Томкович,
А. В. Осипов,
В. В. Панчук,
В. Г. Семенов,
И. В. Плешаков,
М. П. Волков,
В. В. Гусаров
Publication year - 2019
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2019.12.48585.549
Subject(s) - orthoferrite , nanocrystalline material , materials science , bismuth , analytical chemistry (journal) , crystallite , magnetization , microanalysis , scanning electron microscope , mineralogy , crystallography , chemistry , nanotechnology , metallurgy , physics , organic chemistry , chromatography , quantum mechanics , magnetic field , composite material
Nanocrystalline magnetically ordered materials based on Ca-doped bismuth orthoferrite were synthesized by glycine-nitrate combustion method. The samples were characterized by X-ray diffractometry, helium pycnometry, Brunauer–Emmett–Teller method, scanning electron microscopy and elemental energy dispersive microanalysis. It was shown that all samples were isostructural to bismuth orthoferrite. The particles of nanopowders (with average particle size of about 0.3 m) were composed of nanocrystals (with average crystallite size of about 40 nm). The difference between magnetic properties of Ca-doped samples and pure bismuth orthoferrite were demonstrated by Mössbauer spectroscopy and magnetometry. It was found that the samples contain nanocrystals with modified magnetic parameters and a small amount of fine fraction of other phases with a magnetic order.