SrFe0.9Ti0.1O3−δ: A cluster spin glass

The magnetic ground state of nanocrystalline SrFe0.9Ti0.1O3−δ system has been investigated from 2 K to 300 K using AC Susceptibilty (ACS), magnetization and neutron diffraction measurements. The cusp in the temperature dependent magnetization and dispersion below Tmax (the temperature at which the maximum susceptibility is observed) in real part of ac susceptibility with frequency is observed. Arrott plot shows the lack of MS (spontaneous magnetization) down to 2 K, and the non-occurrence of magnetic Bragg reflections below the Tmax in neutron diffraction measurements, indicates the absence of long range ferro and antiferromagnetic order. The frequency dependence of Tmax obeys Vögel–Fulcher model establishing the cluster spin glass behavior in this system.