Room temperature ferroelectric and ferromagnetic properties of multiferroics xLa0.7Sr0.3MnO3–(1−x)ErMnO3 (weight percent x=0.1, 0.2) composites

A different kind of multiferroics with composite character, xLa0.7Sr0.3MnO3 (LSMO)–(1−x)ErMnO3 (EMO) (x=0.1, 0.2), where EMO is the ferroelectric (FE) and LSMO is the ferromagnetic (FM) component, has been studied. Magnetization versus magnetic field measurements at 300K show prominent hysteresis loops, attesting room temperature FM behavior of these multiferroic composites. Dielectric constant (ε) as a function of temperature reveals that paraelectric-FE transition temperature TC* (525K) and maximum value of ε (318) remain almost unaffected for x=0.1 composite compared to pure EMO. Polarization versus electric field study at 300K give conclusive evidence of the presence of spontaneous polarization in this x=0.1 composite. For x=0.2 composite, decreasing TC* (430K) with increase in ε value (774) indicates diffusive FE character.