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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.3
- 수록면
- 27 - 30 (4page)
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초록· 키워드
오류제보하기
Nano-sized manganese ferrite powders and films, MnFe₂O₄, were fabricated by the sol-gel method, and the effects of annealing temperature on the crystallographic and magnetic properties were studied by using X-ray diffractometry, field emission scanning electron microscopy, Mossbauer spectroscopy, and vibrating sample magnetometry. X-ray diffraction spectroscopy of powder samples annealed above 523 K indicated the presence of spinel structure, and the film samples annealed above 773 K also had spinel structure. The particle size increased with the annealing temperature. For the powder samples, the Mossbauer spectra annealed above 573 K could be fitted as the superposition of two Zeeman sextets due to the tetrahedral and octahedral sites of Fe³? ions. Using the Mossbauer subspectrum area ratio the cation distribution could be written as (Mn<SUB>0.52</SUB>Fe<SUB>0.48</SUB>) [Mn<SUB>0.48</SUB>Fe<SUB>1.52</SUB>] O₄. However the spectrum annealed at 523 K only showed as a doublet due to a superparamagnetic phase. As the annealing temperature was increased, the saturation magnetization and the corecivity of the powder samples increased, as did the coercivity of film samples.
목차
1. Introduction
2. Experiment
3. Results and Discussion
4. Conclusion
Acknowledgements
References
참고문헌 (14)
참고문헌 신청
1. [단행본] - N. N. Greenwood / 1971 / Mössbauer spectroscopy / Chapman and Hall Ltd : 265 ~
2. [학술지(정기간행물)] - A. H. Qureshi / 2006 / / J. Cryst. Growth 286 : 365 ~
3. [학술지(정기간행물)] - J. Nie / 2003 / / J. Magn. Magn. Mater 265 : 172 ~
4. [학술지(정기간행물)] - M. K. Shobana / 2009 / / Mater. Chem. Phys 113 : 10 ~
5. [학술지(정기간행물)] - M. H. Mahmoud / 2005 / / Solid State Ionics 176 : 1333 ~
2. [학술지(정기간행물)] - A. H. Qureshi / 2006 / / J. Cryst. Growth 286 : 365 ~
3. [학술지(정기간행물)] - J. Nie / 2003 / / J. Magn. Magn. Mater 265 : 172 ~
4. [학술지(정기간행물)] - M. K. Shobana / 2009 / / Mater. Chem. Phys 113 : 10 ~
5. [학술지(정기간행물)] - M. H. Mahmoud / 2005 / / Solid State Ionics 176 : 1333 ~
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UCI(KEPA) : I410-ECN-0101-2012-428-004224585