Singh, Jitendra Pal Lee, Sangsul Chae, Keun Hwa 2024-01-19T19:03:10Z 2024-01-19T19:03:10Z 2021-09-05 2019-10 0042-207X https://pubs.kist.re.kr/handle/201004/119500 In the present work, zinc ferrite thin films on glass substrates were grown using radio-frequency sputtering method in oxygen environment at base pressure of 2 x 1(-6) Torr. As-grown films were annealed at 200 degrees C for 1, 3 and 5 h. X-ray diffraction study envisaged the existence of peaks corresponding to (311) and (440) planes of cubic spinel structure. Both the lattice parameter and crystallite size increased with annealing time leading to crystal perfection with annealing time. Fourier transform infrared spectroscopic study showed presence of bands corresponding to metal-oxygen vibrations in the spinel lattice. Fe K-edge extended X-ray absorption fine structure (EXAFS) measurements revealed that the tetrahedral site occupancy of Fe3+ ions are 1.2 for as-grown zinc ferrite thin film. This occupancy is 1.18, 1.12 and 1.09 for annealing times of 1, 3 and 5 h, respectively. These observations were supported by Zn K-edge EXAFS investigations. X-ray magnetic circular dichroism measurements performed for these films show negative exchange interaction among the Fe3+ ions situtated at different sites. Thus, zinc ferrite thin films having excess occupancy at tetrahedral site was successfully designed on glass substrate. English PERGAMON-ELSEVIER SCIENCE LTD RAY-ABSORPTION SPECTROSCOPY CATION DISTRIBUTION NANOPARTICLES TEMPERATURE SITES Design of zinc ferrite thin films with excess tetrahedrally coordinated Fe3+ ions and their magnetic interactions Article 10.1016/j.vacuum.2019.108848 1 VACUUM, v.168 VACUUM 168 scie scopus 000490044200053 2-s2.0-85070397210 Materials Science, Multidisciplinary Physics, Applied Materials Science Physics Article RAY-ABSORPTION SPECTROSCOPY CATION DISTRIBUTION NANOPARTICLES TEMPERATURE SITES ZnFe2O4 Cation occupancy Extended X-ray absorption fine structure X-ray magnetic circular dichroism