Electron spin resonance and magnetization studies of Bi rich La-manganites

The phenomenon of phase separation (PS) and coexistence of magnetic phases at different length scales of ferromagnetic (FM) metallic and antiferromagnetic (AFM) charge or orbital ordered insulating domains in manganites has been a subject of study in recent years. The effect of low levels of doping at La-site has been reported in La- manganites. However, studies on La-manganites containing high Bi doping levels are not available in the literature. In this work we report the study of evolution of different magnetic phases as a function of high Bi doping levels and temperature in La_0.7-xBi_xCa_0.3MnO₃ (x ≥ 0.35) manganites, using electron spin resonance (ESR) and magnetization measurements.