Exploration of (1−x)BaTiO3 + xZnFe2O4 magneto-electric ceramic composite on charge density: Structure and its characterization

• Published in: Journal of alloys and compounds 2021-12, Vol.888, p.161491, Article 161491
• Main Authors: Meenakshi, S.V., Saravanan, R., Srinivasan, N., Dhayanithi, D., Giridharan, Nambi Venkatesan
• Format: Article
• Language: English
• Subjects: Band gap; Barium titanates; Capacitance; Charge density; Density distribution; Dielectric constant; Dielectric loss; Electrical properties; Ferrite; Ferromagnetism; Hysteresis curve; Magnetic properties; Magnetic saturation; Magnetization; Magnetoelectric effect; Room temperature; Structural analysis; Zinc ferrites
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2021.161491

•Charge density analysis of the composite (1-x)BaTiO3 + xZnFe2O4 (x = 0.2, 0.4, 0.6, 0.8) prepared by solid state synthesis method.•For x = 0.2–0.6, the dielectric constant decreases and is maximum for x = 0.8, is correlated with the electron density studies.•The sample changes from lossy capacitance to resistive capacitance.•The electron density plays an important role in the magnetization of the composite since the saturation magnetization decreases for x = 0.4 to x = 0.6, though the ferrite content increases.•The characteristics of the prepared composite is correlated with the electron density studies. Magneto-electric ceramic composite of (1−x)BaTiO3 + xZnFe2O4 (x = 0.2, 0.4, 0.6, 0.8) was prepared by solid state synthesis method. Powder XRD confirms the presence of two distinct phases (BaTiO3 and ZnFe2O4) as tetragonal and cubic. Charge density distribution in the unit cells of BaTiO3 and ZnFe2O4 were analyzed and correlated with the observed results of the characterization. The PE characterization of the electrical studies reveals that the prepared composite changes from lossy capacitance and to resistive capacitance with the increase in the ferrite composition. For x = 0.8 (20% BaTiO3; 80% ZnFe2O4), the dielectric constant is the maximum. The dielectric loss increases with the increase in the ferrite content. From the charge density studies, it can be inferred that the TiO bond assumes a major role in elucidating the electrical characterization of the prepared composite. The magnetic characterization confirms the presence of small ferromagnetic property in the composite. Saturation magnetization varies from 0.583 emu/g to 1.359 emu/g at room temperature with an increase in the ferrite content. In addition to the ferrite content in the composite, the charge density between the atoms is also responsible for the magnetization of the composite.