High-temperature properties of Mn0.75 Co2.25 BO5 compound

Magnetic Resonance in Solids, 26(3), art. no. 24301

Temperature-dependence measurements specific heat, thermoelectric power, conductivity, and electron paramagnetic resonance measurements were performed on Mn_0.75Co_2.25BO₅ powder at temperatures above 290 K. Single crystals of Mn_0.75Co_2.25BO₅ were grown by the flux method using Bi₂Mo₃O₁₂-based solvent diluted with Na₂CO₃. To investigate EPR and specific heat capacity, the single crystals were ground to powder. The temperature dependencies of the resistance, specific heat, Seebeck constant, and EPR spectra in the range from 290 K to 700 K were obtained. The transition from the dielectric state to the semiconductor state was detected at 348 K, consistent with the change in the fine structure of the EPR spectrum associated with S = 5/2 for the manganese ion Mn²⁺.