In this study, the La0.5Sr0.5Ti1xFexO3 nanopowders were synthesized
by hydrothermal method according to the previous work
[15]. Lanthanum chloride hydrate (98.5% purity, Fluka), strontium
chloride hexahydrate (99% purity, Fluka), iron nitrate hexahydrate
(99.99% purity, Kento) and titanium diisopropoxide bis(acetyl acetonate
75 wt.% in isoproponol, Aldrich) were used as the starting
materials. Initially, lanthanum chloride hydrate and strontium
chloride hexahydrate and iron nitrate hexahydrate were dissolved
in de-ionized water under vigorous magnetic stirring for 10 min
until the clear solution was obtained. Titanium diisopropoxide bis(acetyl
acetonate) was gradually dropped into this solution. The
obtained solution was stirred at room temperature for 10 h in
air, and dried at 80 C in an oven. The obtained precursor powder
was mixed with 2 M KOH solution of which the pH is 13.96. The
mixture solution was stirred using a magnetic stirrer at room tem-