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논문 기본 정보

자료유형
학술저널
저자정보
Kwang Pyo Chae (건국대학교) Woo Hyun Kwon (건국대학교) Jae-Gwang Lee (건국대학교)
저널정보
한국자기학회 Journal of Magnetics Journal of Magnetics Vol.15 No.1
발행연도
2010.3
수록면
25 - 28 (4page)

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This study examined the crystallographic and magnetic properties of vanadium-substituted lithium cobalt titanium ferrite, Li<SUB>0.7</SUB>Co<SUB>0.2</SUB>Ti<SUB>0.2</SUB>V<SUB>0.2</SUB>Fe<SUB>1.7</SUB>O₄. Ferrite was synthesized using a conventional ceramic method. The samples annealed below 1040 ℃ showed X-ray diffraction peaks for spinel and other phases. However, the sample annealed above 1040 ℃ showed a single spinel phase. The lattice constant of the sample was 8.351 A, which was relatively unaffected by vanadium-substitution. The average grain size after vanadium- substitution was 13.90 ㎛, as determined by scanning electron microscopy. The Mossbauer spectrum could be fitted to two Zeeman sextets, which is the typical spinel ferrite spectra of Fe<SUP>3+</SUP> with A and B sites, and one doublet. From the absorption area ratio of the Mossbauer spectrum, the cation distribution was found to be (Co<SUB>0.2</SUB>V<SUB>0.2</SUB>Fe<SUB>0.6</SUB>)[Li<SUB>0.7</SUB>Ti<SUB>0.2</SUB>Fe<SUB>1.1</SUB>]O₄. Vibrating sample magnetometry revealed a saturation magnetization and coercivity of 36.9 emu/g and 88.6 Oe, respectively, which were decreased by vanadium-substitution.

목차

1. Introduction
2. Experimental Method
3. Results and Discussion
4. Conclusion
Acknowledgements
References

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UCI(KEPA) : I410-ECN-0101-2010-428-002243842