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
- 2013.3
- 수록면
- 34 - 38 (5page)
이용수
초록· 키워드
오류제보하기
This paper studies the effects of the Mn-site substitution by nickel on the magnetic properties and the magnetocaloric properties of La<SUB>0.7</SUB>Ca<SUB>0.3</SUB>Mn<SUB>1-x</SUB>Ni<SUB>x</SUB>O₃ (x = 0, 0.05 and 0.1). The orthorhombic crystal structures of the samples are confirmed by the room temperature X-ray diffraction. The dependence of the Curie temperature (T<SUB>C</SUB>) and the magnetic entropy change (ΔS<SUB>M</SUB>) on the Ni doping content was investigated. The samples with x = 0 had the first order phase transition, while the samples with x = 0.05 and 0.1 had the second order phase transition. As the concentration of Ni increased, the maximum entropy change (|ΔS<SUB>M</SUB>|<SUB>max</SUB>) decreased gradually, from 2.78 Jㆍ㎏?¹ㆍK?¹ (x = 0) to 1.02 Jㆍ㎏?¹ㆍK?¹ (x = 0.1), in a magnetic field change of 15 kOe. The measured value of T<SUB>C</SUB> was 185 K, 150 K and 145 K for x = 0, 0.05 and 0.1, respectively. The phase transition temperatures became wider as x increased. It indicates that the Mn-site substitution by Ni may be used to tailor the Curie temperature in La<SUB>0.7</SUB>Ca<SUB>0.3</SUB>Mn<SUB>1-x</SUB>Ni<SUB>x</SUB>O₃.
목차
1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusion
References
참고문헌 (0)
참고문헌 신청이 논문의 저자 정보
최근 본 자료
댓글(0)
0
UCI(KEPA) : I410-ECN-0101-2014-420-003165798