Hall Effect in Single-Crystal Lithium Ferrite

Between 170° and 330°K, the Hall mobility of the flux-grown lithium ferrite single crystal has a maximum at 295.5°K. At 295.5°K, the ordinary Hall coefficient R0 was found to be +3.26×102 cm3/C, which corresponds to a carrier concentration of 1.92×1016-cm−3. The extraordinary Hall coefficient R1′ was 1.9×102 cm3/C. Above 295.5°K, μH = 1.39×10−2[exp(1.54×103/T) −1], which indicates a mechanism of optical mode scattering. Below 295.5°K, μH = (2.591×105/T) exp(−0.149 eV/KT), which indicates a diffusion mechanism. The majority carriers (p-type) can be attributed to the Fe2+ ions, and the minority carriers (n-type) to the oxygen vacancies.