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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2013.3
- 수록면
- 21 - 25 (5page)
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초록· 키워드
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Nickel substituted manganese ferrites, Mn<SUB>1-x</SUB>Ni<SUB>x</SUB>Fe₂O₄ (0.0 ≤ x ≤ 0.6), were fabricated by sol-gel method. The effects of sintering and substitution on their crystallographic and magnetic properties were studied. X-ray diffractometry of Mn<SUB>0.6</SUB>Ni<SUB>0.4</SUB>Fe₂O₄ ferrite sintered above 523 K indicated a spinel structure; particles increased in size with hotter sintering. The Mossbauer spectrum of this ferrite sintered at 523 K could be fitted as a single quadrupole doublet, indicative of a superparamagnetic phase. Sintering at 573 K led to spectrum fitted as the superposition of two Zeeman sextets and a single quadrupole doublet, indicating both ferrimagnetic and paramagnetic phase. Sintering at 673 K and at 773 K led to spectra fitted as two Zeeman sextets due to a ferrimagnetic phase. The saturation magnetization and the coercivity of Mn<SUB>0.6</SUB>Ni<SUB>0.4</SUB>Fe₂O₄ ferrite sintered at 773 K were 53.05 emu/g and 142.08 Oe. In Mn<SUB>1-x</SUB>Ni<SUB>x</SUB>Fe₂O₄ (0.0 ≤ x ≤ 0.6) ferrites, sintering of any composition at 773 K led to a single spinel structure. Increased Ni substitution decreased the ferrites’ lattice constants and increased their particle sizes. The Mossbauer spectra could be fitted as the superposition of two Zeeman sextets due to the tetrahedral and the octahedral sites of the Fe³? ions. The variations of saturation magnetization and coercivity with changing Ni content could be explained using the changes of particle size.
목차
1. Introduction
2. Experiment
3. Results and Discussion
4. Conclusion
References
참고문헌 (16)
참고문헌 신청
1. [학술지(정기간행물)] - A. S. Albaguergye / 2000 / / J. Appl. Phys 87 : 4352 ~
2. [단행본] - A. Goldman / 1990 / Modern Ferrite Technology / Van Nostrand Reinhold : 217 ~
3. [학술지(정기간행물)] - P. A. Shaikh / 2010 / / J. Alloys Compd 492 : 590 ~
4. [학술지(정기간행물)] - D. A. Kukuruznyak / 2006 / / J. Electro. Spectro. Relatd Pheno 150 : 275 ~
5. [학술지(정기간행물)] - 권우현 / 2010 / Synthesis and Magnetic Properties of Zn, Co and Ni Substituted Manganese Ferrite Powders by Sol-gel Method / Journal of Magnetics 15 (4) : 159 ~ 164
2. [단행본] - A. Goldman / 1990 / Modern Ferrite Technology / Van Nostrand Reinhold : 217 ~
3. [학술지(정기간행물)] - P. A. Shaikh / 2010 / / J. Alloys Compd 492 : 590 ~
4. [학술지(정기간행물)] - D. A. Kukuruznyak / 2006 / / J. Electro. Spectro. Relatd Pheno 150 : 275 ~
5. [학술지(정기간행물)] - 권우현 / 2010 / Synthesis and Magnetic Properties of Zn, Co and Ni Substituted Manganese Ferrite Powders by Sol-gel Method / Journal of Magnetics 15 (4) : 159 ~ 164
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UCI(KEPA) : I410-ECN-0101-2014-420-003165763