Mössbauer studies of Fe_0.7-xSi_0.3Mn_x Alloys

In this work we present Fe⁵⁷ Mössbauer study for the alloy system Fe_0.7-xSi_0.3Mn_x, where 0 ≤ x ≤ 0.3. Mössbauer spectroscopic results show that all the samples studied are magnetically ordered at 77 K, and at room temperature, except for x = 0.3 at 300 K where it shows paramagnetic behavior. The average magnetic hyperfine field is found to decrease with increasing the manganese concentration at 77 K and 300 K. The average magnetic hyperfine field is found to increase with decreasing the temperature from 300 K to 77 K for all samples under investigation. The average isomer shift is found to decrease with increasing the manganese concentration.