NA, JG LEE, TD KIM, EC KIM, CS PARK, SJ 2024-01-21T22:37:07Z 2024-01-21T22:37:07Z 2022-01-10 1993-02 0021-4922 https://pubs.kist.re.kr/handle/201004/146120 The migration path of Co ions in Co-substituted spinel ferrite thin films is investigated in detail during magnetic annealing. To this end, changes in the saturation magnetization were measured as a function of magnetic annealing time at various temperatures. Changes in Mossbauer spectra were also taken. The ferrite thin films were prepared by a reactive sputtering method. For Co-substituted ferrite thin films annealed at various temperatures, peaks were observed in the plots of the saturation magnetization vs annealing time, whilst the saturation magnetization remained nearly constant for Co-free ferrite thin films during magnetic annealing. From a subsequent Mossbauer spectroscopic investigation, it was confirmed that the peaks in the saturation magnetization-annealing time curves for Co-substituted ferrite thin films are originated from cation redistribution, i.e., the migration of Fe ions on tetrahedral sites (A sites) to octahedral sites (B sites) and Co ions on the B sites to the A sites. English JAPAN J APPLIED PHYSICS THE MIGRATION PATH OF CO IONS IN CO-SUBSTITUTED SPINEL FERRITE THIN-FILMS DURING MAGNETIC ANNEALING Article 10.1143/JJAP.32.796 1 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, v.32, no.2, pp.796 - 799 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 32 2 796 799 scie scopus A1993KQ00400023 2-s2.0-0027543583 Physics, Applied Physics Article CO-SUBSTITUTED FERRITE THIN FILM REACTIVE SPUTTERING MAGNETIC ANNEALING MIGRATION PATH OF CO ION MOSSBAUER SPECTRUM