| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 828571 | Materials & Design (1980-2015) | 2015 | 5 Pages |
•XRD indicates that all diffraction peaks widen with increasing amounts of lanthanum.•Mössbauer analysis exhibits Zeeman-split due to Fe3+ ions at tetrahedral and octahedral Sites.•Hyperfine fields of A/B-sites first increase and then decrease with increased La content.
Lanthanum substituted cobalt ferrite Cu0.5Co0.5Fe2−xLaxO4 (x = 0, 0.01, 0.03, 0.05) powders have been prepared by a sol–gel method. X-ray diffraction (XRD) results indicate the production of a single phase cubic-spinel structure. Both the lattice parameter and grain size decrease with the substitution of La3+ ions. Scanning electron microscope (SEM) shows that the ferrite powers are nanoparticles. Room temperature Mössbauer spectra of Cu0.5Co0.5Fe2−xLaxO4 are two normal Zeeman-split sextets, which display ferrimagnetic behavior. The saturation magnetization, coercivity and residual magnetization increase at first and then decrease with the incorporation of La3+.
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