Electron spin resonance and resistivity studies of charge-ordered Bi(1−x)SrxMnO3

► The temperature dependent electron spin resonance (ESR) and electrical resistivity studies on Bi(1−x)SrxMnO3 (x = 0.3, 0.4, 0.45, and 0.5) were carried out. ► The double integrated (DI) intensity of the ESR signal verses temperature and ln DI vs 1000/T plots have been used to get information about magnetic interactions. ► The Neel temperature (TN) of the sample is found to increase with increase in Sr content. ► In the temperature range T > TN domains of ferromagnetic (FM) and antiferromagnetic (AFM) correlations co-exist. ► The contribution of AFM correlations increase with the increase in Sr content. ► The observation of weak ESR signal in the temperature range below TN indicates the freezing of FM microdomains/inhomogeneities in the AFM long range ordered state. ► The resistivity data is analyzed in view of the polaron model and the Mott's and Efros-Shklovskii variable range hopping (VRH) model of electrical conduction. ► As per Motts VRH model, ln ρ varies linearly with T−1/4 with a change in slope at TN. The estimated values of hopping distance and localization length are reasonable. ► It is also found that ln ρ varies linearly with T−1/2 in according with the ES VRH model however the estimated values of the model parameters are unrealistic. ► The ESR and resistivity data are also analyzed in view of phase separation (PS) model.