Structural, dielectric and magnetic studies of (0-3) type multiferroic (1-x) BaTi0.8Sn0.2O3-(x) La0.5Ca0.5MnO3(0 <= x <= 1) composite ceramics

S. Ben Moumen (1) , Y. Hadouch , Y. Gagou (2) , D. Mezzane (1) , M. Amjoud (1) , E. Choukri (1) , Z. Kutnjak (3) , B. Rozic , N. Abdelmoula (4) , H. Khemakhem (4) , Y. El Amraoui , V. Laguta , M. El Marssi (2)

1 LMCN - Laboratoire de Matière Condensée et Nanostructures
2 LPMC - Laboratoire de Physique de la Matière Condensée - UR UPJV 2081
3 IJS - Jozef Stefan Institute [Ljubljana]
4 FSS - Faculté des Sciences de Sfax

Multiferroic composites with the composition (1 - x) BaTi0.8Sn0.2O3-(x) La0.5Ca0.5MnO3(x = 0, 0.3, 0.5, 0.7, 0.9 and 1) were prepared by sol-gel techniques. Rietveld refinements of the composites with 0-3 and 3-0 type connectivities exhibit the formation of pure phases and confirm the fraction of the composite samples. It was found that the composites grain size decreases slightly with increasing the La(0.5)Ca(0.5)MnO(3)content. Magnetic measurements of the composite ceramics exhibit a gradual increase in saturation and remanent magnetization with increasing La(0.5)Ca(0.5)MnO(3)content. Dielectric data demonstrate that the composite materials show high values of the dielectric constant in comparison with the parent compound BaTi0.8Sn0.2O3(BTSO). In addition, an attempt is made to measure the magnetoelectric coupling coefficient and to explain the negative permittivity and losses occurring in these materials at a certain frequency and temperature conditions.

Domaines: Matière Condensée [cond-mat]

S. Ben Moumen, Y. Hadouch, Y. Gagou, D. Mezzane, M. Amjoud, et al.. Structural, dielectric and magnetic studies of (0-3) type multiferroic (1-x) BaTi0.8Sn0.2O3-(x) La0.5Ca0.5MnO3(0 <= x <= 1) composite ceramics. Journal of Materials Science: Materials in Electronics, 2020, 31 (21), pp.19343-19354. ⟨10.1007/s10854-020-04468-3⟩. ⟨hal-03627376⟩