首页|Magnetic characteristics and FTIR bands of cerium doped perovskite-type (Ba0.5Sr0.5)(Fe1-xCex)O3-d (x=0-1.0) oxides
Magnetic characteristics and FTIR bands of cerium doped perovskite-type (Ba0.5Sr0.5)(Fe1-xCex)O3-d (x=0-1.0) oxides
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NSTL
Elsevier
Doped perovskite-type oxides have diversified applications in sensors, inorganic membranes, piezoelectricity, and solid oxide fuel cells. An attempt has been made here to synthesize (Ba0.5Sr0.5)(Fe1-xCex)O3-delta (x = 0 - 1.0) powders by decomposition of sol-gel derived oxalate at 750-950 ?degrees C for 5 h to study the effect of cerium insertion with regard to Fourier transform infrared (FTIR) bands and magnetic characteristics. It is shown that the coercivity (H-c) increases from similar to 83.4 to 1985 Oe and saturation magnetization decreases from similar to 0.146 to 0.041 emu/g as structure changes from cubic (x = 0) to orthorhombic (x = 1.0). The law of saturation approximation (LAS) agrees well with observed saturation magnetization. The transition temperatures are found to be similar to 500, 370, and 370.12 K for x = 0, 0.6, and 1.0, respectively. High coercivity (similar to 1985 Oe) and hysteresis in (Ba0.5Sr0.5) CeO3-delta (x = 1.0) arise due to the presence of oxygen vacancies and structural distortion. FTIR spectra show different types of bands related to the iron and/or cerium-oxygen (i.e., Fe/Ce - O) stretching vibrations. The redshift has been observed with cerium in (Ba0.5Sr0.5)(Fe1-xCex)O3-delta. These properties make them useful in magnetic recording and storage applications.
NSTL
Elsevier
