This paper reports the synthesis, structural characteristics and magnetism of SrFe12O19/MCe0.04Fe1.96O4 (M = Cu, Ni, Mn, Co and Zn) hard/soft nanocomposites.The hard/soft compositions were manufactured via a one-pot reactions citrate sol-gel approach.
The hard/soft phases formation was confirmed using XRD, SEM, TEM and HRTEM techniques.M vs.H (Magnetization measurements) were done at unbent temperature and 10 K.Smoothed M against H loops and single peaks in dM/dH vs.
H curves were noticed in SrFe12O19/MnCe0.04Fe1.96O4, Novel antibiofilm chemotherapies target nitrogen from glutamate and glutamine SrFe12O19/CuCe0.04Fe1.
96O4 and SrFe12O19/ZnCe0.04Fe1.96O4 hard/soft nanocomposites.This indicated the manifestation of well exchange-coupled effect among hard and soft phases in these composites.
However, SrFe12O19/CoCe0.04Fe1.96O4 and SrFe12O19/NiCe0.04Fe1.
96O4 hard/soft nanocomposites showed non-well smoothed M against H loops and two peaks in dM/dH versus H plots, indicating that the dipolar interactions are unimportant compared to exchange-coupling behavior.Among all prepared nanocomposites, the SrFe12O19/MnCe0.04Fe1.96O4 hard/soft nanocomposite showed the highest exchange-coupling behavior.
Microwave properties of the SrFe12O19/MCe0.04Fe1.96O4 (M = Cu, Ni, Mn, Co and Zn) hard/soft nanocomposites were investigated using coaxial method with applied Corporate Social Responsibility and Earnings Management: The Moderating Role of Corporate Governance frequency values fall between 2 and 18 GHz.Reflection losses were calculated from frequency dependences of the imaginary and real parts of permeability and permittivity.
The correlation between the chemical composition of the spinel phase (A-cation) and microwave properties of composites.Most intensive electromagnetic absorption was observed for Ni- and Mn-spinels.This is can be a result of the differences in electron shell configuration and radii for A-site ions in the spinel phase.Change of the absorption mechanisms (transition from ionic polarization to dipole polarization) was observed.