Ion Diffusion and Disaccommodation in Ferrites

概要

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In various mixed ferrites, the relationship between disaccommodations (DA) and cation vacancy densities was investigated, the latter being estimated from the diffusion coefficients of isotopes. The relaxation time of DA-I observed at approximately 250℃ was in agreement with an extrapolated value from the cation diffusion at elevated temperatures, and the two activation energies were nearly equal, 1.5 eV. The magnitude of DA-III observed at room temperature did not necessarily correspond to the vacancy density, i.e., an iron-poor Mn-Zn ferrite containing an appreciable amount of the vacancies did not exhibit DA-III.
社団法人応用物理学会の論文
1968-08-05