지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.9
- 수록면
- 256 - 264 (9page)
- DOI
- 10.4283/JMAG.2021.26.3.256
이용수
초록· 키워드
오류제보하기
The nanocrystalline powders of Cr-doped SnO₂ with Cr-dopant concentrations of 2, 4 and 6 wt%, were synthesized by a simple hydrothermal method. XRD results, along with the FT-IR and SAED patterns, confirmed the formation of the SnO₂’s tetragonal phase without other impurity phases. Optical analysis revealed a significant decrease in the energy gap of the doped samples from 3.69 to 3.40 eV. X-ray absorption spectroscopy, including x-ray absorption near-edge spectroscopy, was used to qualitatively investigate the valence states of doped Cr. Room temperature ferromagnetism was observed in Cr-doped SnO₂ samples. The highest value of magnetization was found in SnO₂ doped with 4 wt% of Cr (about 4.88 memu/g) and decreased slightly as the Cr concentration increased. The reduction of magnetization with the increase of Cr content happened because antiferromagnetic Cr-O-Cr super-exchange interaction took place within the nearest Cr<SUP>3+</SUP> ions through O<SUP>2-</SUP> ions. The oxygen vacancies were induced by the ferromagnetism in the Cr-doped SnO₂ nanocrystalline powders.
목차
1. Introduction
2. Experimental Procedure
3. Results and Discussion
4. Conclusion
References
참고문헌 (48)
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