Surface magnetic interactions between Bi0.85La0.15FeO3 and BaFe12O19 nanomaterials in (1-x)Bi0.85La0.15FeO3-(x)BaFe12O19 nanocomposites
Abstract
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.
- Publication:
-
Journal of Magnetism and Magnetic Materials
- Pub Date:
- August 2020
- DOI:
- 10.1016/j.jmmm.2020.166862
- Bibcode:
- 2020JMMM..50866862P
- Keywords:
-
- Multiferroics;
- Composites;
- Ferromagnetism;
- Antiferromagnetism;
- LA to saturation;
- ΔH~M plot