Significantly improved near-field communication antennas based on novel Ho3+ and Co2+ ions co-doped Ni–Zn ferrites
In near-field communication (NFC) antennas, soft magnetic ferrites are usually applied as a substrate to reduce eddy current loss and increase magnetic field coupling. For this purpose, the applied ferrites are required to have high permeability and saturation magnetization together with low magneti...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2024-03-01
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| Series: | Journal of Advanced Ceramics |
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| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2024.9220853 |
| _version_ | 1797202597493342208 |
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| author | Pao Yang Zhiqing Liu Hongbin Qi Xiuli Fu Zhijian Peng |
| author_facet | Pao Yang Zhiqing Liu Hongbin Qi Xiuli Fu Zhijian Peng |
| author_sort | Pao Yang |
| collection | DOAJ |
| description | In near-field communication (NFC) antennas, soft magnetic ferrites are usually applied as a substrate to reduce eddy current loss and increase magnetic field coupling. For this purpose, the applied ferrites are required to have high permeability and saturation magnetization together with low magnetic loss and dielectric loss. However, for most soft magnetic ferrites, it is difficult to meet all the requirements. Herein novel Ni–Zn ferrite ceramics co-doped by Ho3+ and Co2+ ions with chemical formula Ni0.5−xZn0.5Ho0.02CoxFe1.98O4 (x = 0–0.2) were designed and prepared to balance these needs on the basis of molten salt synthesis with metal nitrates as raw materials and potassium hydroxide (KOH) as the precipitation agent and molten salt precursor. After the substitution of Ho3+, the saturation magnetization and initial permeability decrease, but with further doping of Co2+, the saturation magnetization gradually increases, while the initial permeability continues to decrease. When x = 0.1, the sample will have the lowest dielectric constant, magnetic and dielectric loss, as well as the highest Curie temperature (305 ℃). Moreover, the acquired Ni–Zn ferrites have been applied simulatively in NFC antennas, revealing that the device manufactured with the optimal Ni0.4Zn0.5Ho0.02Co0.1Fe1.98O4 ferrite ceramics would have significantly improved performance at 13.56 MHz with low leakage and long transmit distance of magnetic field. Therefore, the Ni0.4Zn0.5Ho0.02Co0.1Fe1.98O4 ferrite ceramics would be a good candidate for NFC antenna substrates. |
| first_indexed | 2024-04-24T08:05:58Z |
| format | Article |
| id | doaj.art-4f23a146eadb4284a9edc5defd2ea647 |
| institution | Directory Open Access Journal |
| issn | 2226-4108 2227-8508 |
| language | English |
| last_indexed | 2024-04-24T08:05:58Z |
| publishDate | 2024-03-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj.art-4f23a146eadb4284a9edc5defd2ea6472024-04-17T10:37:39ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082024-03-0113329330910.26599/JAC.2024.9220853Significantly improved near-field communication antennas based on novel Ho3+ and Co2+ ions co-doped Ni–Zn ferritesPao Yang0Zhiqing Liu1Hongbin Qi2Xiuli Fu3Zhijian Peng4School of Science, China University of Geosciences, Beijing 100083, ChinaSchool of Science, China University of Geosciences, Beijing 100083, ChinaSchool of Science, China University of Geosciences, Beijing 100083, ChinaSchool of Science, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaSchool of Science, China University of Geosciences, Beijing 100083, ChinaIn near-field communication (NFC) antennas, soft magnetic ferrites are usually applied as a substrate to reduce eddy current loss and increase magnetic field coupling. For this purpose, the applied ferrites are required to have high permeability and saturation magnetization together with low magnetic loss and dielectric loss. However, for most soft magnetic ferrites, it is difficult to meet all the requirements. Herein novel Ni–Zn ferrite ceramics co-doped by Ho3+ and Co2+ ions with chemical formula Ni0.5−xZn0.5Ho0.02CoxFe1.98O4 (x = 0–0.2) were designed and prepared to balance these needs on the basis of molten salt synthesis with metal nitrates as raw materials and potassium hydroxide (KOH) as the precipitation agent and molten salt precursor. After the substitution of Ho3+, the saturation magnetization and initial permeability decrease, but with further doping of Co2+, the saturation magnetization gradually increases, while the initial permeability continues to decrease. When x = 0.1, the sample will have the lowest dielectric constant, magnetic and dielectric loss, as well as the highest Curie temperature (305 ℃). Moreover, the acquired Ni–Zn ferrites have been applied simulatively in NFC antennas, revealing that the device manufactured with the optimal Ni0.4Zn0.5Ho0.02Co0.1Fe1.98O4 ferrite ceramics would have significantly improved performance at 13.56 MHz with low leakage and long transmit distance of magnetic field. Therefore, the Ni0.4Zn0.5Ho0.02Co0.1Fe1.98O4 ferrite ceramics would be a good candidate for NFC antenna substrates.https://www.sciopen.com/article/10.26599/JAC.2024.9220853ni–zn ferriteco-dopingelectromagnetic propertiesmicrostrip antennas |
| spellingShingle | Pao Yang Zhiqing Liu Hongbin Qi Xiuli Fu Zhijian Peng Significantly improved near-field communication antennas based on novel Ho3+ and Co2+ ions co-doped Ni–Zn ferrites Journal of Advanced Ceramics ni–zn ferrite co-doping electromagnetic properties microstrip antennas |
| title | Significantly improved near-field communication antennas based on novel Ho3+ and Co2+ ions co-doped Ni–Zn ferrites |
| title_full | Significantly improved near-field communication antennas based on novel Ho3+ and Co2+ ions co-doped Ni–Zn ferrites |
| title_fullStr | Significantly improved near-field communication antennas based on novel Ho3+ and Co2+ ions co-doped Ni–Zn ferrites |
| title_full_unstemmed | Significantly improved near-field communication antennas based on novel Ho3+ and Co2+ ions co-doped Ni–Zn ferrites |
| title_short | Significantly improved near-field communication antennas based on novel Ho3+ and Co2+ ions co-doped Ni–Zn ferrites |
| title_sort | significantly improved near field communication antennas based on novel ho3 and co2 ions co doped ni zn ferrites |
| topic | ni–zn ferrite co-doping electromagnetic properties microstrip antennas |
| url | https://www.sciopen.com/article/10.26599/JAC.2024.9220853 |
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