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VOLUME 22 (1975) | ISSUE 1 | PAGE 29
New mechanism of low-temperature transformation in ferrites containing Mn3+ ions
We investigated the behavior of the temperature dependences of the electric resistivities of four samples: Cu0.8Fei.6O4, Cuo.67FeL34Mno.99O4, CuQ4FeQ4 óÇ04íÐ!8ï4( and Cu3/gFe3i8Cr3/8Mn15i& 04. We observed abrupt changes in the resistivity of all samples in the region 100-150°K. On the basis of our results and those of Buchenau et al, it is proposed that the anomalous behavior of the resistivity is due to the onset of negative Mn3+-Mn3+ cation-cation interaction in the ÷ sites.