The relationship between ionic conductivity and magnetization intensity in ferrites was studied as a function of water uptake. The K ferrite exhibited a relatively small variation in ionic conductivity (from 1.44 to 0.09S/m) and magnetization intensity upon hydration, but underwent a recovery of ionic conductivity upon dehydration. The differing behaviors of magnetization and ionic conductivity in various ferrites was attributed to the amount of water uptake, and to a difference in reactivity between Na and K in the crystals.

H.Takamura, T.Kagotani, M.Okada, M.Homma: Materials Transactions, 1993, 34[3], 197-201