Ferromagnetic resonance induced large microwave magnetodielectric effect in cerium doped Y3Fe5O12 ferrites.

Fu Chen,Yajie Chen,Jun Ouyang,Xian Wang,Zekun Feng,Yan Nie,Qifan Li,Vincent G Harris

doi:10.1038/srep28206

Abstract

In recent years, multifunctional materials contained simultaneous ferroelectric and ferromagnetic ordering have been realized. Here, a real time room temperature adaptive materials system, which demonstrates an RF magnetodielectric (MD) response, i.e., CexY3−xFe5O12 (x = 0, 0.05, 0.1, 0.15, 0.2), is reported. The magnetic and dielectric properties of Ce-doped YIG microwave ferrites processed by a traditional ceramic route have been measured over a frequency range of 4–8 GHz (C-band). The substitution of Ce not only enhances the microwave electromagnetic properties of the YIG, but also modulates the magnetodielectric response. The maximum magnetodielectric response in Ce-doped YIG sample ranges in magnitude from approximately +5% to −5% under an applied field of 1.78 kOe. This effect was attributed to electron fluctuations on the Fe cation sites. Furthermore, the magnitude of the MD response was shown to be enhanced by the cerium content. It is believed that research of the magnetodielectric effect in YIG ferrites is of great importance to the development of next generation multifunctional adaptive microwave materials, devices and integrated circuits.

Highlights

In recent years, multifunctional materials contained simultaneous ferroelectric and ferromagnetic ordering have been realized
The level of research activity dedicated to these material systems declined due to the rare existence, and the relatively low ME/MD coupling in single phase materials
It has been confirmed that the MF composites combining piezoelectric (BaTiO3, PZT, PVDF, PMN-PT etc.) and magnetostrictive (CoFe2O4, NiFe2O4, CuFe2O4, Terfenol-D etc.) phases can achieve large ME coupling at room temperature[9,10,11,12]

Summary

Introduction

Multifunctional materials contained simultaneous ferroelectric and ferromagnetic ordering have been realized. It is believed that research of the magnetodielectric effect in YIG ferrites is of great importance to the development of generation multifunctional adaptive microwave materials, devices and integrated circuits. The level of research activity dedicated to these material systems declined due to the rare existence, and the relatively low ME/MD coupling in single phase materials. Owing to the large conversion between magnetic and electrical energy at room temperature, it is the multi-phase MF materials that have garnered more attentions and are believed to possess greater potential for multifunctional microwave device applications[7,8]. Of particular interest are electrically-tunable microwave devices as real time adaptive magnetoelectric systems having low microwave loss and strong ME/MD coupling effects[19,20,21]. The effect of Ce ions upon the MD response in this system has been discussed in order to investigate the origin and underlying mechanisms responsible for the MD effect

Methods

Results

Conclusion