通过X射线衍射分析和超导量子干涉磁强计(SQUID)磁性测量, 研究了Co替代Fe含量对居里温度在室温以上的磁制冷材料La(Fe1-xCox)11.7Al1.3(x=0.072, 0.081)磁结构和磁性能的影响. La(Fe1-xCox)11.7Al1.3材料的居里温度随Co的含量增加而增加, La(Fe0.919Co0.081)11.7Al1.3的居里温度为311 K. 当外场变化为1.9 T时磁熵变达到3.6 J·kg-1·K-1, RCP值为168.6 J·kg-1, 虽然它的磁熵变小于具有巨磁熵变的磁制冷材料, 但是它在磁场为1.9 T时的制冷能力与这些材料相当.
参考文献
| [1] | Pecharsky VK;Gschneidner KA .Giant magnetocaloric effect in Gd-5(Si2Ge2)[J].Physical review letters,1997(23):4494-4497. |
| [2] | Tegus O;Brück E;Buschow K H J;de Boer F R .Transition-metal-based magnetic refrigerants for room-temperature applications[J].Nature,2002,415:150. |
| [3] | Wada H;Asano T .Effect of heat treatment on giant magnetocaloric properties of Mn1+δAs1-xSbx[J].Journal of Magnetism and Magnetic Materials,2005,703:290-291. |
| [4] | Feng-xia Hu;Bao-gen Shen;Ji-rong Sun;Guang-jun Wang;Zhao-hua Cheng .Very large magnetic entropy change near room temperature in LaFe_(11.2)Co_(0.7)Si_(1.1)[J].Applied physics letters,2002(5):826-828. |
| [5] | 张宏伟,孙继荣,胡凤霞,王芳,沈保根.La-Fe基NaZn13型化合物的磁场诱导熵变研究[J].中国稀土学报,2005(04):385-393. |
| [6] | Long Y;Zhang ZY;Wen D;Wu GH;Ye RC;Chang YQ;Wan FR .Phase transition processes and magnetocaloric effects in the Heusler alloys NiMnGa with concurrence of magnetic and structural phase transition - art. no. 046102[J].Journal of Applied Physics,2005(4):46102-0. |
| [7] | 段静芳,张泽玉,王东,龙毅,叶荣昌,常永勤.具有一级磁相变的不同系列NiMnGa合金其电子浓度对相变温度的影响[J].中国稀土学报,2005(04):405-408. |
| [8] | Tegus O.;Bruck E.;Zhang L.;Dagula.;Buschow KHJ.;de Boer FR. .Magnetic-phase transitions and magnetocaloric effects[J].Physica, B. Condensed Matter,2002(1/4):174-192. |
| [9] | Fujita A;Fujieda S;Hasegawa Y;Fukamichi K .Itinerant-electron metamagetic transition and large magnetocaloric effects in La(FexSi1-x)13 compounds and their hudrides[J].Physical Review B,2003,67:104416. |
| [10] | Wang F;Chen Y F;Wang G J;Sun J R, Shen B G .Large magnetic entropy change and magnetic properties in La(Fe1-xMnx)11.7Si1 3Hy hydrides[J].Chinese Physics Letters,2003,12(08):0911. |
| [11] | Hu Fengxia;Shen Baogen;Sun Jirong;Cheng Zhaohua .Large magnetic entropy change in La(Fe,Co)11.83Al1 17[J].Physical Review B,2001,64:012409. |
| [12] | Gomes AM;Proveti JR;Takeuchi AY;Passamani EC;Larica C;Guimaraes AP .La(Fe1-xCox)(11.44)Al-1.56: A composite system for Ericsson-cycle-based magnetic refrigerators[J].Journal of Applied Physics,2006(11):16107-1-16107-3-0. |
| [13] | Wang F;Chen Y F;Wang G J;Sun J R, Shen B G .The large magnetic entropy change and the change in the magnetic ground state of the antiferromagnetic compound LaFe11.5Al1 5 caused by carbonization[J].Journal of Physics:Condensed Matter,2005,16(12):2103. |
| [14] | Shen Jun,LI Yang-Xian,Wang Fang,WANG Guang-jun,Zhang Shao-Ying.Effect of Co substitution on magnetic properties and magnetic entropy changes in LaFe11.83Si0.94Al0.23 Compounds[J].中国物理（英文版）,2004(07):1134-1138. |
| [15] | Mazet T;Ihou-Mouko H;Malaman B .Mn3Sn2:A promising material for magnetic refrigeration[J].Applied Physics Letters,2006,89:022503. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%