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研究了La0.6Pr04Fe11.4Si1.6 B0.2合金及其氢化物La0.6 Pr0.4Fe11.4 Si1.6 B0.2Hy的制备工艺与磁热效应.室温XRD分析与SEM成分分析表明La0.6Pr0.4Fe11.4Si1.6B0.2合金主相为NaZn13型立方结构(空间群为Fm-3c),存在富La相(空间群为P4/nmm)与富Fe相.氢化物La0.6Pr0.4Fe11.4 Si1.6B0.2Hy的晶格常数a由合金的1.2295 nm增大到1.2491 nm.DSC测定氢化物的氢含量y约为1.7.磁性测量结果表明:氢化物La0.6Pro.4Fe11.4Si1.6B0.2Hy的居里温度Tc由合金的198 K增至325 K,提高了127 K.在0~1.5 T外磁场下合金与氢化物最大磁熵变-△SMmax均为9.1 J·kg-1·K-1.氢化物La0.6P0.4 F114 Si1.6B02Hy在室温下搁量190 d后物相与磁热效应基本保持不变.

参考文献

[1] H. Wada;Y. Tanabe .Giant magnetocaloric effect of MnAs_(1-x)Sb_(x)[J].Applied physics letters,2001(20):3302-3304.
[2] 胡义嘎,松林,王高峰,李福安,特古斯.Cr,Mn,Co,Ni替代对LaFe11.5Si1.5磁性与磁热效应的影响[J].稀有金属,2011(06):877-882.
[3] 伊博乐,松林,门德,刘璟芳,伊日勒图,特古斯.LaGd_(0.1)Fe_(11.4-x)CO_xSi_(1.6)(X=0.1,0.3,0.5,0.7,0.9)合金的磁热效应[J].稀有金属,2010(01):128-132.
[4] Cheng ZH;Di NL;Li QQ;Kou ZQ;Luo Z;Ma X;Wang GJ;Hu FX;Shen BG .Mossbauer effect probe of field-induced magnetic phase transition in LaFe13-xSix intermetallic compounds[J].Applied physics letters,2004(10):1745-1747.
[5] 胡凤霞,沈保根,孙继荣,王光军,成昭华.LaFe11.2Co0.7Si1.1合金在室温区的巨大磁熵变[J].物理,2002(03):139-140.
[6] Direct measurements of magnetocaloric effect in the first-order system LaFe_(11.7)Si_(1.3)[J].Journal of Applied Physics,2003(9):5503-5506.
[7] 胡凤霞,沈保根,孙继荣,王光军,成昭华.LaFe11.2Co0.7Si1.1合金在室温区的巨大磁熵变[J].物理,2002(03):139-140.
[8] F. X. Hu;X. L. Qian;J. R. Sun;G. J. Wang;X. X. Zhang;Z. H. Cheng;B. G. Shen .Magnetic entropy change and its temperature variation in compounds La(Fe_(1-x)Co_(x))_(11.2)Si_(1.8)[J].Journal of Applied Physics,2002(7):3620-3623.
[9] Fujita A.;Fujieda S.;Hasegawa Y.;Fukamichi K. .Itinerant-electron metamagnetic transition and large magnetocaloric effects in La(FexSi1-x)(13) compounds and their hydrides - art. no. 104416[J].Physical review, B. Condensed matter and materials physics,2003(10):4416-0.
[10] Fujieda S;Fujita A;Fukamichi K .Enhancement of magnetocaloric effects in La1-zPrz(Fe0.88Si0.12)(13) and their hydrides[J].Journal of Applied Physics,2007(2):23907-1-23907-5-0.
[11] Chen YF.;Wang F.;Shen BG.;Hu FX.;Sun JR.;Wang GJ.;Cheng ZH. .Magnetic properties and magnetic entropy change of LaFe11.5Si1.5Hy interstitial compounds[J].Journal of Physics. Condensed Matter,2003(7):L161-L167.
[12] Chen YF.;Wang F.;Shen BG.;Sun JR.;Wang GJ.;Hu FX.;Cheng ZH.;Zhu T. .Effects of carbon on magnetic properties and magnetic entropy change of the LaFe11.5Si1.5 compound[J].Journal of Applied Physics,2003(10 Pt.2):6981-6983.
[13] 黄焦宏,松林,金培育,王高峰,刘金荣,闫宏伟,张久兴.LaFe11.17-xCo0.78Si1.05Bx合金磁热效应的研究[J].功能材料,2006(12):1888-1890.
[14] 李福安,松林,包黎红,哈斯朝鲁,特古斯,黄焦宏.LaFe11.9-xCoxSi1.1B0.2(x=0.7,0.8,0.9)合金的磁热效应[J].金属学报,2008(03):371-374.
[15] 李福安,松林,王高峰,谢国秋,郑立,黄焦宏,特古斯.LaFe_(11.4)Si_(1.6)B_y系列化合物的磁性和磁熵变[J].功能材料,2010(03):515-519.
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