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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.12
- 수록면
- 457 - 460 (4page)
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초록· 키워드
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In this paper, magnetic property and magnetocaloric effect (MCE) in perovskite manganites of the type La<SUB>(0.75-X)</SUB>Ce<SUB>X</SUB>Ca<SUB>0.25</SUB>MnO<SUB>3</SUB> (x = 0.0, 0.2, 0.3 and 0.5) synthesized by using the standard solid state reaction method have been reported. From the magnetic measurements as a function of temperature and applied magnetic field, we have observed that the Curie temperature (T<SUB>C</SUB>) of the prepared samples strongly dependent on Ce content and was found to be 255, 213 and 150 K for x = 0.0, 0.2 and 0.3, respectively. A large magnetocaloric effect in vicinity of T<SUB>C</SUB> has been observed with a maximum magnetic entropy change (|ΔSM|<SUB>max</SUB>) of 3.31 and 6.40 J/kgK at 1.5 and 4 T, respectively, for La<SUB>0.55</SUB>Ce<SUB>0.2</SUB>Ca<SUB>0.25</SUB>MnO<SUB>3</SUB>. In addition, relative cooling power (RCP) of the sample under the magnetic field variation of 1.5 T reaches 59 J/kg. These results suggest that La<SUB>0.55</SUB>Ce<SUB>0.2</SUB>Ca<SUB>0.25</SUB>MnO<SUB>3</SUB> compound could be a suitable candidate as working substance in magnetic refrigeration at 213 K.
목차
1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions
Acknowledgments
References
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UCI(KEPA) : I410-ECN-0101-2013-428-001369170