Structural, magnetic and dielectric properties of (Mg1xCox)TiO3 (x¼0–0.07) ceramics prepared by the
semi-alkoxide precursor method are investigated. All the sintered samples exhibit paramagnetic nature
at room temperature, but magnetic susceptibility increases with increasing Co content up to 0.03 and
decreases at higher Co content. Temperature dependent magnetization data obtained under zero-fieldcooled
(ZFC) and field-cooled (FC) conditions reveal a ferromagnetic to paramagnetic phase transition
around 228 K for x¼0.03 and bifurcation between the ZFC and FC data shifts to lower temperature from
170 to 150 K with increasing the applied field from 100 to 500 Oe. The broadband dielectric properties
are studied in the temperature range 133–300 K and in the frequency range of 1 MHz to 1 GHz. It is
observed that both ε0 and ε00 of (Mg0.97Co0.03)TiO3 ceramic increase with increasing temperature.
Interestingly, the temperature dependent dielectric properties of (Mg0.97Co0.03)TiO3 ceramic measured at
1 GHz exhibit anomalies at temperatures where the magnetic phase transitions were observed.