Magnetodielectric mechanism and application of magnetoelectric composites

• Published in: Journal of magnetism and magnetic materials 2022-05, Vol.550, p.169099, Article 169099
• Main Authors: Yao, Xi, Zhou, Jian-Ping, Zhang, Xiao-Li, Chen, Xiao-Ming
• Format: Article
• Language: English
• Subjects: Ceramics; Composite materials; Electric fields; Excitation; Ferroelectricity; Lead zirconate titanates; Magnetic fields; Magnetic permeability; Magnetic properties; Magnetodielectric effect; Multiferroic composite; Nickel ferrites; Permeability; Permittivity
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/j.jmmm.2022.169099

•Magnetodielectric mechanism was analyzed in magnetodielectric toroids in detail.•Magnetoelectric coupling is the main origin of magnetodielectric effect.•A device combination of capacitor and inductor was put forward. Magnetodielectric (MD) composite ceramics NiFe2O4/Pb(Zr0.53Ti0.47)O3 (NFO/PZT) and Ni0.4Zn0.6Fe2O4/Pb(Zr0.53Ti0.47)O3 (NZFO/PZT) were prepared by conventional oxide ceramic technology. The MD effect and electric-field-induced magnetic permeability (EIMP) to different excitation signals were studied in detail, including ac and dc magnetic fields, and ac electric field. Among them, the amplitude H0 of ac magnetic field plays a main role in the MD effect. The MD behavior mainly comes from the magnetoelectric coupling between the ferroelectric and magnetic components in the magnetoelectric composites after a detailed analysis. The maximal dielectric change of NFO/PZT and NZFO/PZT composite ceramics reach 0.83% and − 0.49%, respectively. Nevertheless, the EIMP is weak to the ac electric field. The possible application of MD materials in device was proposed on the basic of the research results of the electrical or magnetic properties under the outfield excitation.