Magnetization and mössbauer studies of ⁵⁷Fe doped SrCoO₃

⁵⁷Fe (1%) doped SrCoO₃ obtained by high-pressure method, has been investigated by magnetization and Mössbauer spectroscopy studies (MS) in the temperature range 4.2 K to 300 K. The ferromagnetic ordering temperature T _C obtained is 272(2) K. Isothermal magnetization curves have been measured at various temperatures, from which the saturation moments (M _sat) have been deduced. The ⁵⁷Fe MS spectra display standard six-line patterns with an isomer shift typical of Fe ^3∈+∈ and a very small quadrupole splitting (QS = 0.14(1) mm/s above T _C). The magnetic hyperfine field at 4.2 K is 276(1) kOe. The temperature dependencies of the iron hyperfine field and M _sat (1.83 μ _B at 5 K) are almost identical. This shows that the Fe^3∈+∈ is replacing Co^4∈+∈, both of the same electronic configuration. They also interact similarly, namely the Fe-Co exchange is almost identical to the Co-Co exchange.