Site-controlled multi-ion substitution enabling low-loss and high-permittivity microwave ferrites
Modern wireless communication and radar systems urgently require the application of low-loss and high-permittivity yttrium iron garnet (YIG) ferrite for highly efficient and integrated microwave circulators, isolators, filters, etc. However, achieving a high dielectric constant, low dielectric loss,...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2025-05-01
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| Series: | Journal of Advanced Ceramics |
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| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2025.9221076 |
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| author | Xiaofeng Zhang Qifan Li Tao Wu Zhong Yu Xiaona Jiang Chuanjian Wu Zhongwen Lan Ke Sun |
| author_facet | Xiaofeng Zhang Qifan Li Tao Wu Zhong Yu Xiaona Jiang Chuanjian Wu Zhongwen Lan Ke Sun |
| author_sort | Xiaofeng Zhang |
| collection | DOAJ |
| description | Modern wireless communication and radar systems urgently require the application of low-loss and high-permittivity yttrium iron garnet (YIG) ferrite for highly efficient and integrated microwave circulators, isolators, filters, etc. However, achieving a high dielectric constant, low dielectric loss, and narrow ferromagnetic resonance (FMR) linewidth simultaneously is challenging. Here, we synthesized Bi–Ca–Zr co-substituted YIG ferrites and comprehensively investigated the effects of multi-ion substitution on the polycrystalline microstructure and microwave electromagnetic properties of the material. The introduction of Bi3+ ions at the crystallographic dodecahedral sites enhances the electronic polarization of single Fe3+ ions and the superexchange interaction between them. The substitution ofZr4+ ions for Fe3+ ions at octahedral sites suppresses the FMR linewidth broadening caused by magnetocrystalline anisotropy. Moreover, multi-ion substitution results in competition between liquid phase sintering and grain boundary pinning and influences the densification and grain growth processes, resulting in a non-uniform and dense microstructure composed of crystallites with a bimodal size distribution. This distinctive morphology further contributes to FMR linewidth reduction and permittivity increase. The optimized Bi–Ca–Zr co-substituted YIG ferrite has a narrow FMR linewidth of 33 Oe, high permittivity of 27, and high Curie temperature of 200 °C, making it a promising candidate for next-generation microwave devices. |
| format | Article |
| id | doaj-art-1a8e83b6881b490d92d6c0800e687dcf |
| institution | Kabale University |
| issn | 2226-4108 2227-8508 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj-art-1a8e83b6881b490d92d6c0800e687dcf2025-08-20T03:29:06ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082025-05-01145922107610.26599/JAC.2025.9221076Site-controlled multi-ion substitution enabling low-loss and high-permittivity microwave ferritesXiaofeng Zhang0Qifan Li1Tao Wu2Zhong Yu3Xiaona Jiang4Chuanjian Wu5Zhongwen Lan6Ke Sun7School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, ChinaModern wireless communication and radar systems urgently require the application of low-loss and high-permittivity yttrium iron garnet (YIG) ferrite for highly efficient and integrated microwave circulators, isolators, filters, etc. However, achieving a high dielectric constant, low dielectric loss, and narrow ferromagnetic resonance (FMR) linewidth simultaneously is challenging. Here, we synthesized Bi–Ca–Zr co-substituted YIG ferrites and comprehensively investigated the effects of multi-ion substitution on the polycrystalline microstructure and microwave electromagnetic properties of the material. The introduction of Bi3+ ions at the crystallographic dodecahedral sites enhances the electronic polarization of single Fe3+ ions and the superexchange interaction between them. The substitution ofZr4+ ions for Fe3+ ions at octahedral sites suppresses the FMR linewidth broadening caused by magnetocrystalline anisotropy. Moreover, multi-ion substitution results in competition between liquid phase sintering and grain boundary pinning and influences the densification and grain growth processes, resulting in a non-uniform and dense microstructure composed of crystallites with a bimodal size distribution. This distinctive morphology further contributes to FMR linewidth reduction and permittivity increase. The optimized Bi–Ca–Zr co-substituted YIG ferrite has a narrow FMR linewidth of 33 Oe, high permittivity of 27, and high Curie temperature of 200 °C, making it a promising candidate for next-generation microwave devices.https://www.sciopen.com/article/10.26599/JAC.2025.9221076garnet ferritesion substitutionferromagnetic resonance (fmr) linewidthdielectric constantcurie temperature |
| spellingShingle | Xiaofeng Zhang Qifan Li Tao Wu Zhong Yu Xiaona Jiang Chuanjian Wu Zhongwen Lan Ke Sun Site-controlled multi-ion substitution enabling low-loss and high-permittivity microwave ferrites Journal of Advanced Ceramics garnet ferrites ion substitution ferromagnetic resonance (fmr) linewidth dielectric constant curie temperature |
| title | Site-controlled multi-ion substitution enabling low-loss and high-permittivity microwave ferrites |
| title_full | Site-controlled multi-ion substitution enabling low-loss and high-permittivity microwave ferrites |
| title_fullStr | Site-controlled multi-ion substitution enabling low-loss and high-permittivity microwave ferrites |
| title_full_unstemmed | Site-controlled multi-ion substitution enabling low-loss and high-permittivity microwave ferrites |
| title_short | Site-controlled multi-ion substitution enabling low-loss and high-permittivity microwave ferrites |
| title_sort | site controlled multi ion substitution enabling low loss and high permittivity microwave ferrites |
| topic | garnet ferrites ion substitution ferromagnetic resonance (fmr) linewidth dielectric constant curie temperature |
| url | https://www.sciopen.com/article/10.26599/JAC.2025.9221076 |
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