| 서큘레이터/아이솔레이터용 YIG 페라이트의 첨가제와 자기적 특성 연구 |
| 윤휘영, 유승규1, 이수형2, 윤종남3, 김정식 |
서울시립대학교 재료공학과
1진성전자(주)
2청주대학교 물리학과
3전자부품연구원 |
| The Study on the Additives and Magnetic Property of YIG Ferrites for Circulator/Isolator |
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| ABSTRACT |
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Yittrium Iron Garnet(YIG) has been used as an important material in the circulator/isolator which is used in RF communication system, mobile phone, adn satellite broadcasting, etc. In this study, we investigated the microstructural and magnetic properties of YIG ferrites with the sintering temperature and additives. We fabricated the YIG ferrites substituted with Ca, In, V by the traditional ceramic sintering method at 1250$^{C}$, 1275$^{C}$, 1300$^{C}$ and 1325$^{C}$. Powders were granulated by using a spray dryer. Crystallographic and microstructural properties were measured by using XRD and SEM. Magnetic properties were measured by using a VSM for saturation magnetization (4$pi$M$_$s/) and FMR (Ferromagnetic Resonance) experiment for ferromagnetic resonance line width (△H). The YIG ferrite, Y$_$1.6/Ca$_$1.4/Fe$_4$V$_$0.7/In$_$0.3/O$_$12/, sintered at 1300$^{C}$, showed higher saturation magnetization and lower ferromagnetic resonance line width than any other sintering temperatures. |
| Key words:
YIG ferrites, Magnetic property, Spray drying |
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