通过X射线衍射仪研究了1300℃退火1h后的La0.7 Ce0.3(Fe1-x Cox)11.44 Si1.56(x=0.04、0.0 6、0.08)合金的相结构.采用振动样品磁强计研究了合金的磁性能.结果表明,合金主相具有NaZn13型结构,含有少量α-Fe和LaFeSi杂相;x=0.04、0.06和0.08时,合金的居里温度Tc分别为230.8、261、288.9K,在1.1T的外磁场变化下,等温磁熵变|△SM|分别为2.44、1.86和1.55J/(kg·K).
参考文献
| [1] | Gschneidner K A Jr;Pecharsky V K;Tsokol A O .[J].Reports on Progress in Physics,2005,68:1479-1539. |
| [2] | Pecharsky VK;Gschneidner KA .Giant magnetocaloric effect in Gd-5(Si2Ge2)[J].Physical review letters,1997(23):4494-4497. |
| [3] | Guo Z B;Zhang J R;Huang H et al.[J].Applied Physics Letters,1997,70:904. |
| [4] | Hu F X;Shen B G;Sun J et al.[J].Applied Physics Letters,2001,78:3675. |
| [5] | Tegus O;Brack E;Buschow K H J et al.[J].Nature,2002,415:150. |
| [6] | Fujita A;Akamatsu Y;Fukamichi K .[J].Journal of Applied Physics,1999,85:4756. |
| [7] | Palstra T T;Mydosh J A;Nieuwenhuys G J et al.[J].Journal of Magnetism and Magnetic Materials,1983,36:290-296. |
| [8] | Liu X B;Ahounian Z .[J].Journal of Magnetism and Magnetic Materials,2003,264:209-213. |
| [9] | Fujita A;Fukamichi K .[J].Journal of Alloys and Compounds,2005,404:554-558. |
| [10] | Liu XB;Altounian Z;Tu GH .The structure and large magnetocaloric effect in rapidly quenched LaFe11.4Si1.6 compound[J].Journal of Physics. Condensed Matter,2004(45):8043-8051. |
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