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

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.

Nanocrystalline cerium-doped Y-type barium hexaferrite; a useful catalyst for selective oxidation of styrene

“…(907.6 eV) and Ce 4+ 3d3/2 (918.0 eV) have also been recognized within the sample [51,52]. The analysis for the Co 2p spectrum in the sample becomes much more complicated due to the coexistence of intensive Ba 3d spectrum within the same range of binding energies (780 to 795 eV).…”

Features of structure, magnetic state and electrodynamic performance of SrFe12−xInxO19

“…Such materials are mainly composites of complex oxides of transition metals 6 . Since the microwave properties of a material are determined not only by the dielectric contribution, but also by the magnetic one, the use of magnetodielectrics is the most suitable solution to the problem 7 . Ferrites are the most typical representatives of complex transition metal oxides with optimal magnetodielectric properties 8 .…”

Role of Ce concentration on the structural and magnetic properties of functional magnetic oxide particles

“…Cerium (Ce) element has amazing quality as it can be effortlessly exchangeable between 4+ valence state and 3+ valence state [66]. Also, cerium substituted yttrium iron oxide attracted much attention due to their remarkable multiferroic (MF) properties such as magnetodielectric (MD) and strong magneto-optical (MO) effects [67][68][69]. Soumah, Lucile, et al, demonstrated that Bismuth substituted Yttrium iron oxide (Bi:YIG) leads to extremely-low Gilbert damping together with perpendicular magnetic anisotropy (PMA) [70].…”