Spectroscopic and structural analysis of Ca substituted La orthoferrite

Samples of orthoferrites La1KxCaxFeO3 (0.15%x%0.45) were synthesized by double sintering ceramic technique. X-ray diffraction and infrared spectroscopy experiments were carried out and discussed for the investigated samples. The data showed the formation of singlephase orthorhombic structure of space group Pbnm. The FTIR spectra were performed in the region (1200–200 cmK1). Four main absorption bands were present with some side bands and shoulders in the range (1200–400 cmK1). Another four bands were appeared in the range (400– 200 cmK1). The positions, intensities and values of the absorptions bands vary depending on the Ca content in the samples. The first absorption band appeared at about 920 cmK1 was assigned to the La–O stretching vibration. q 2005 Elsevier B.V. All rights reserved.