Cairo University

MTPR Journal

 

EVIDENCE OF JAHN-TELLER DISTORTION and PHASE SEPARATION IN Ca DOPED LaMnO3

& doi: https://doi.org/10.1142/9789814317511_0010
M. A. AHMED and S. I. EL-DEK
Materials Science Lab. (1), Physics Dept., Faculty of Science, Cairo University, Giza, Egypt


Vol./Issue: 11 , id: 313

A series of Ca doped LaMnO3 (La1-xCaxMnO3; 0.10≤x≤0.50) was prepared using conventional solid-state reaction. IR spectroscopic analysis was carried out for all samples. All investigated samples were ferromagnetic with the Curie temperature increasing with Ca content. The experimentally calculated values of the effective magnetic moment agree well with those computed theoretically. The largest value of the magnetic susceptibility as well as magnetic moment was achieved at x=0.30 pointing to a typical ferromagnetic character. The hysteresis which appeared in the magnetization during heating and cooling runs for the sample with x=0.30 enhances the choice of the sample x=0.30 as the optimum Ca content.