Migration Path and Charge Conversion of Cations in Co-Substituted Spinel Ferrite Thin Films during Magnetic Annealing

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概要

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• The migration path and charge conversion of cations in Co-substituted spinel ferrite thin films during magnetic annealing are investigated. To this end, changes in the coercivity and lattice parameter were measured as a function of magnetic annealing time. Changes in Mossbauer and X-ray photoelectron spectroscopic (XPS) spectra were also measured. For Co-substituted ferrite thin films, peaks were observed in the plots of the coercivity and lattice parameter vs annealing time, while those for Co-free ferrite thin films were nearly constant during magnetic annealing. From subsequent Mossbauer and XPS experiments, it was confirmed that the peaks in the coercivity and lattice parameter vs annealing time curves for Co-substituted ferrite thin films originate from the migrathorn of Co ions on octahedral sites (B sites) to tetrahedral sites (A sites) and Fe ions on the A sites to the B sites. It is also suggested that the charge valencies of Co ions on the B sites change from +2 to +3 when they reach the Asites, and return to +2 when they arrive at the B sites.

• 社団法人応用物理学会の論文
• 1994-11-15

著者

• Na Jong-gab

  Division Of Advanced Materials Korea Institute Of Science And Technology

• Lee Taek-dong

  Department Of Advanced Materials Engineering

• PARKE Soon-Ja

  Department of Inorganic Materials Engineering, Seoul National University

• Parke Soon-ja

  Department Of Inorganic Materials Engineering Seoul National University

関連論文

• Migration Path and Charge Conversion of Cations in Co-Substituted Spinel Ferrite Thin Films during Magnetic Annealing

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