Improved crystallinity, spatial arrangement and monodispersity of submicron La0.7Ba0.3MnO3 powders: A citrate chelation approach

► Perovskite manganite systems have been chemically treated to enhance their magnetoresistive (MR) responses. ► A novel route to synthesize manganite nanomaterials using a top-down approach has been used. ► Submicron and polydispersed particles are chelated to get uniform sized and well-connected particles. ► Their grain boundaries have been engineered to obtain the low-field magnetoresistance response.