Structural distortion induced enhancement of magnetic and dielectric properties in Pr modified yttrium iron garnet films

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作   者：

Jiao, Tejing;  You, Caiyin;  Tian, Na;  Duan, Zongfan;  Yan, Fuxue; 

作者机构：

Xian Univ Technol; 

关键词：

THIN-FILMS;  TRANSITION;  PHASE;  Dielectric properties;  PERFORMANCE;  YPr x IG thin films;  ION;  Structural distortion;  DY3+;  Magnetic properties;  DOPED Y3FE5O12; 

期刊名称：

Ceramics International

i s s n：

0272-8842

年卷期：

2023 年 49 卷 6 期

页   码：

10129-10138

页   码：

摘   要：

Low saturation magnetization and low dielectric constant significantly limited the application of Yttrium iron garnet (Y3Fe5O12, YIG) film, which could be enhanced through structural distortion. In this work, Y3-xPrxFe5O12 (YPrxIG) films were fabricated using chemical solution deposition method. The substitution of Pr3+ for Y3+ was adopted to regulate the symmetry of its polyhedron to induce a structural distortion owing to a larger ion radius of Pr3+ than that of Y3+. YPr0.20IG film exhibited a higher saturation magnetization of 241.2 emu/cm3 than the pure YIG film owing to the enhanced super-exchange from the increased FeO-O-FeT bond angle. The dielectric constant of YPr0.20IG film increased to 22.4 at 12.4 GHz, which was the contribution of electron polarization and ion polarization of Fe2+. The band gap value of YPr0.20IG film was reduced to 2.80 eV. These could be physically clarified that the electrons between Fe2+ and Fe3+ turned to migrate from the valence band to the conduction band.