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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2023.6
- 수록면
- 151 - 161 (11page)
- DOI
- 10.4283/JMAG.2023.28.2.151
이용수
초록· 키워드
오류제보하기
Hexagonal M-type strontium ferrite (SrFe<SUB>12</SUB>O<SUB>19</SUB>) has been fabricated through a simple self-combustion tartrate precursor approach to producing a homogenous powder with a homogeneous shape and limited size distribution at low-processing temperatures. The impacts of the Sr<SUP>2+</SUP>:Fe<SUP>3+</SUP> molar ratio and the annealing temperature on formation, morphological structure, crystallite size, and magnetic performance were studied. The powders were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) profile, and vibrating sample magnetometer (VSM). The development of crystalline single-phase Sr-hexagonal ferrite occurred at ≥ 1100 °C and Sr<SUP>2+</SUP>:Fe<SUP>3+</SUP> molar ratios 1.1:12-1.3:12. Existence of α-Fe₂O₃ and impurities in the hexagonal powders increases the lattice parameters while higher annealing temperature decreases it. The c/a ratios of as-prepared samples (~3.911-3.920) are comfortably within the range of ratios for M-type structures. The platelet-like structure has appeared at an annealing temperature ≥ 1000 °C. The wide saturation magnetization (37.26-66.19 emu/g) and coercivity (275.09-2107.8Oe) were accomplished at diverse synthesis conditions and reached the greatest values at 1350 °C. The squareness ratios (Mr/Ms) for all studied samples are <0.5, which is for multimagnetic domains.
목차
1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusion
References
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