Surface magnetic interactions between Bi0.85La0.15FeO3 and BaFe12O19 nanomaterials in (1-x)Bi0.85La0.15FeO3-(x)BaFe12O19 nanocomposites

• Published in: Journal of magnetism and magnetic materials Vol. 508; p. 166862
• Main Authors: Pandey, Rabichandra, Kumar Pradhan, Lagen, Kumari, Suman, Kumar Manglam, Murli, Kumar, Sunil, Kar, Manoranjan
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.08.2020; Elsevier BV
• Subjects: Anisotropy; Antiferromagnetism; Ball milling; Barium hexaferrite; Chemical reactions; Composites; Crystals; Ferromagnetism; Hysteresis loops; LA to saturation; Magnetic properties; Multiferroics; Nanocomposites; Nanomaterials; Symmetry; ΔH~M plot; Antiferromagnetism; LA to saturation; ΔH~M plot; Composites; Ferromagnetism; Multiferroics
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/j.jmmm.2020.166862

•Increase in Mr, MS and Hc with increase in BHF percentage BLFO-BHF composite.•ΔH ~ M plot explains the magnetic interaction between BLFO and BHF magnetic phase.•Vegard’s law has been used to calculate the theoretical magnetization.•Law of approach to saturation has been employed to analyze the magnetic hysteresis. Two different sets of multiferroic nanocomposites i.e., (1-x)Bi0.85La0.15FeO3-(x)BaFe12O19 with x = 0.00, 0.05, 0.10, 0.20, 0.30, 0.40, 0.50 and 1.00 have been synthesized by the solid-state reaction method and high energy planetary ball mill techniques. The peaks in the XRD patterns can be indexed to R3c crystal symmetry of Bi0.85La0.15FeO3 and P63/mmc crystal symmetry of BaFe12O19. It suggests the absence of any major chemical reaction between the two phases. Moreover, it is assumed thatBi0.85La0.15FeO3 and BaFe12O19 crystal symmetries are present in the composite independently. Magnetic properties have been improved significantly due to the incorporation of BaFe12O19 in the composites. Vegard's law suggests that the experimentally observed magnetizations are higher than that of theoretically calculated value. The difference between the theoretical and experimental magnetization as well as the anomaly in the magnetic hysteresis have been explained by considering the magnetic interaction correlation length between Bi0.85La0.15FeO3 and BaFe12O19 magnetic phases. The hysteresis loop width (ΔH) versus M plots has been introduced to understand the magnetic interaction (exchange bias) between Bi0.85La0.15FeO3 and BaFe12O19. Magnetocrystalline anisotropy increases with the increase in the percentage of BaFe12O19 in the composite.