Investigation of magnetic phase transitions in diluted ferrites: Nickel ferrite

摘要

The Mossbauer spectra of nickel ferrite NiGa (x) Al (x) Fe2 - 2x O-4 were measured with significant dilution by nonmagnetic ions (with x = 0.5, 0.7, and 0.8). In the temperature range of 90-295 K, the ratio of the near- and long-range forces was experimentally found and the Curie temperatures were determined.