Year: 2025
Type: article
Abstract: The influence of Cu2+substitution on magnetic properties of nano particles of ferrite of basic composition Bi1-xCuxFeO3-x/2 (0.0 ≤ x <1.0) synthesized by solid-state reaction method. XRD, EPR and FTIR spectroscopy techniques are used to investigate the structural and magnetic properties of the synthesized nano particles. XRD results confirm that the average crystallite size is found to be 54 nm and it decreases with increase in the concentration of doping. EPR spectrum shown is exhibits only one broad resonance with g about 2.56 suggesting the presence of oxygen vacancy and Fe3+in rhombic structure. EPR results indicating that the compound is in single phase only. The g value calculated for Fe(III) for all the samples is almost the same and is about 2.56. EPR results further confirming that metal ion is placed in rhombic crystal structure. Temperature dependence EPR signals like resonance field, g-factor, line-width, intensity, and asymmetric parameter are doping dependent. Temperature dependence magnetic measurements are strongly supporting the EPR results and indicating there are two magnetic phases at low temperature and after 250 K only paramagnetic behaviour is present in the compound. FTIR spectrum shown indicates the presence of M-O bands along with OH vibrations.
Source: Materials Nanoscience
Institution: B.E.S.T Innovation University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4411060214