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Mössbauer, Infrared And X-Ray Studies For Ni_{0.5}Zn_{0.5}Cr_Xfe_{2-X}O_4 Ferrites, Mohamed Amer, S. Ata-Allah, T. Meaz, S. Aboul-Enein, M. Abd-El-Hamid

Turkish Journal of Physics

Spinel ferrites of the system Ni_{0.5}Zn_{0.5}Cr_xFe_{2-x}O_4, 0 \le x \le 1, have been studied via Mössbauer, IR and X-ray spectra. Mössbauer spectra of the samples showed broad six-line patterns and a central paramagnetic phase. The spectra have been analyzed to two magnetic patterns, A and B, and two quadrupole doublets, C_A and C_B. The patterns A and C_A are assigned to Fe^{3+} ions at the tetrahedral A-sites and the patterns B and C_B to Fe^{3+} and Fe^{2+} ions at the octahedral B-sites. The deduced hyperfine interaction parameters; the isomer shifts, quadrupole splitting, outermost line widths, hyperfine magnetic fields and bulk …