Facile synthesis of shell–core polyaniline/SrFe12O19 composites and magnetic properties

Abstract

Polyaniline (PANI)/SrFe₁₂O₁₉ (SrM) composites were synthesized by in situ polymerization and characterized by XRD, FT-IR, SEM, TEM and VSM. The results showed that SrFe₁₂O₁₉ particles obtained by a hydrothermal method were of uniform hexagonal plate-like structures with diameters ranging from 2–5 μm. PANI/SrM composites with 15 wt% PANI displayed a shell–core structure. The SrFe₁₂O₁₉ particles were embedded in PANI. Magnetic property results showed that, due to the presence of a nonmagnetic PANI layer, the values of M_s, M_r, H_c were all lower than those of the pure SrFe₁₂O₁₉ particle, and indicated the information of a “shell–core” structure composite.