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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.3
- 수록면
- 123 - 127 (5page)
- DOI
- 10.4283/JMAG.2019.24.1.123
이용수
초록· 키워드
오류제보하기
The structural stability and magnetic properties of Mn<SUB>3+x</SUB>Al<SUB>1-x</SUB>C antiperovskite with varied Mn/Al substitution were studied systematically. Single phase Mn<SUB>3+x</SUB>Al<SUB>1-x</SUB>C alloys with antiperovskite structure were obtained in samples with x = −1/4, 0, 1/4, 1/2. An additional Mn<SUB>23</SUB>C₆ phase was precipitated from Mn<SUB>3+x</SUB>Al<SUB>1-x</SUB>C antiperovskite for x = 3/4 while Mn<SUB>23</SUB>C₆ phase was formed as major phase for x = 1. The mutual substitution of Mn and Al atoms has substantial effect on the Curie temperature and the saturation magnetization of the Mn<SUB>3+x</SUB>Al<SUB>1-x</SUB>C alloys. In comparison with the as-cast alloys, the as-annealed Mn<SUB>3+x</SUB>Al<SUB>1-x</SUB>C alloys exhibit reduced Mn/Al substitutions after high temperature homogenization, which enhances the ordering of Mn and Al atoms in the lattices. The Curie temperature of the homogenized Mn<SUB>3+x</SUB>Al<SUB>1-x</SUB>C increases with increasing Mn substitution to Al. The Mn₃AlC alloy shows the highest saturation magnetization among all samples with varied Mn/Al ratios. Most samples show zero coercivity and zero remanent magnetization. The maximum value of the magnetic entropy changes of Mn<SUB>2.75</SUB>Al<SUB>1.25</SUB>C at 285 K is 2.26 J/㎏ K in fields up to 3 T.
목차
1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions
References
참고문헌 (13)
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