Microwave magnetoelectric effects in ferrite—piezoelectric composites and dual electric and magnetic field tunable filters

• Published in: Journal of electroceramics 2010-02, Vol.24 (1), p.5-9
• Main Authors: Tatarenko, A. S., Gheevarughese, V., Srinivasan, G., Antonenkov, O. V., Bichurin, M. I.
• Format: Article
• Language: English
• Subjects: Bandpass filters; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Crystallography and Scattering Methods; Devices; Electric fields; Electrochemistry; Ferrite; Glass; Lead zirconate titanates; Magnetic fields; Materials Science; Microwaves; Natural Materials; Optical and Electronic Materials; Zinc
• ISSN: 1385-3449; 1573-8663
• DOI: 10.1007/s10832-007-9382-1

Magnetoelectric (ME) effects at ferromagnetic resonance (FMR) in ferrite—piezoelectric layered structures have been investigated in lithium zinc ferrite (LZFO)-lead zirconate titanate (PZT) and yttrium iron garnet (YIG)-PZT. When an electric field E is applied to PZT, the piezoelectric deformation is transmitted to the ferrite and results in a shift in FMR. Data on the field shift caused by E are presented and compared with theory. Although the strength of ME coupling is weaker in YIG-PZT than in LZFO-PZT, the E -assisted field shift in YIG-PZT is much higher than the resonance line width and is potentially useful for filter applications. An electric field tunable YIG-PZT microwave band-pass filter based on ME effects at FMR is designed and characterized. The device can be tuned over a wide frequency band with a bias magnetic field and over a narrow band with a voltage applied across PZT. Data on tuning range, insertion loss, and device characteristics are presented.