通过X射线衍射手段研究了Tm2CrFe14.5 Si1.5化合物的热膨胀性质及本征磁致伸缩性质.研究结果表明,Tm2CrFe14.5Si1.5化合物在303～623 K范围内,具有单相的Th2Ni17型结构;Tm2CrFe14.5Si1.5化合物的居里温度约为453 K,比其母合金Tm2 Fe17高约163 K;沿a轴方向上,Tm2CrFe 14.5 Si1.5化合物在423～448 K温度范围内出现负热膨胀现象,其热膨胀系数(α)a为-0.716×10-5/K;沿c轴方向上,在303～398 K温度范围内也出现负热膨胀现象,其热膨胀系数(α)c为-0.547×10-5/K.两者综合的结果使得在423～448 K温度范围内,Tm2CrFe14.5Si1.5化合物的体热膨胀系数(α)为-0.794 × 10-5/K.对本征磁致伸缩的研究结果表明,Tm2CrFe14.5 Si1.5化合物中存在着较强的各向异性的本征磁致伸缩.
参考文献
| [1] | Mary T A;Evans J S O;Vogt T;Sleight A W .Negative thermal expansion from 0.3 to 1050 Kelvin in ZrW2O8[J].Science,1996,272(5258):90. |
| [2] | Evans J S O;Mary T A;Sleight A W .Negative thermal expansion in a large mol-ybdate and tungstate family[J].Journal of Solid State Chemistry,1997,133(02):580. |
| [3] | Cao D.;Bridges F.;Kowach GR.;Ramirez AP. .Correlated atomic motions in the negative thermal expansion material ZrW2O8: A local structure study - art. no. 014303[J].Physical review, B. Condensed matter and materials physics,2003(1):4303-0. |
| [4] | 沈俊,李养贤,胡凤霞,王光军,张绍英.Ce2Fe16Al化合物在居里温度附近的磁性和磁熵变[J].物理学报,2003(05):1250-1254. |
| [5] | 郝延明,赵伟,高艳.Y2（Fe1-x-y,Coy,Crx）17化合物的结构及居里温度[J].物理学报,2003(10):2612-2615. |
| [6] | Yanming Hao;Yan Gao;Bowen Wang;Jingping Qu;Yangxian Li;Jifan Hu;Jiachun Deng .Negative thermal expansion and magnetic properties of Y_(2)Al_(3)Fe_(14-x)Mn_(x) compounds[J].Applied physics letters,2001(21):3277-3279. |
| [7] | Hao Y M;Zhou Y;Zhao M .Negative thermal expansion and spontaneous magnetostriction of Tb2Fe16.5 Cro 5 compound[J].Journal of Applied Physics,2005,97(11):116102. |
| [8] | Hao Y M;Zhou Y;Zhao M .Negative thermal expansion and spontaneous magnetostriction of Dy2AlFe10 Mn6 compound[J].Advances in Engineering Materials,2005,7(06):517. |
| [9] | Hao YM;Zhao M;Zhou Y;Hu JF .Negative thermal expansion and spontaneous volume magnetostriction of Tb2Fe16Cr compound[J].Scripta materialia,2005(3):357-360. |
| [10] | Hao Yanming;Liang Feifei;Zhang Xuemin;Wu Yanzhao;Qin Hongwei;Hu Jifan .Structural and Magnetic Properties of Tm_(2)CrFe_(16-x)Si_(x) Compounds[J].IEEE Transactions on Magnetics,2011(10):3614-3616. |
| [11] | Gubbens P C M;Buschow K H J .Magnetic phase transition in Tm2Fe17[J].Applied Physics,1973,44(08):3739. |
| [12] | Hao Y M;Tan M;Wang W;Wang F .Anomalous thermal expansion and spontaneous magnetostriction of Gd2Fe16 Cr[J].Chin Phys B,2010,19(06):067502. |
| [13] | Hao YM;Zhao M;Zhou Y;Hu JF .Negative thermal expansion and spontaneous volume magnetostriction of Tb2Fe16Cr compound[J].Scripta materialia,2005(3):357-360. |
| [14] | Yanming Hao;Xuemin Zhang;Bowen Wang;Yizhe Yuang;Fang Wang .Anomalous thermal expansion and magnetic properties of Tm_(2)Fe_(17-x)Cr_(x) compounds[J].Journal of Applied Physics,2010(2):023915-1-023915-7. |
| [15] | Liang F F;Hao Y M;Wu Y Z .Negative thermal expansion of Tm2Fe15SiCr compound[J].Advances in Materials Research,2011,311-313:764. |
| [16] | Hao Y M;Zhang X M;Liang F F;Wang F,Wang B W .Anomalous thermal expansion of Gd2 Fe15.5 Cr1 5 compound[J].Journal of Rare Earths,2010,28:474. |
| [17] | HAO Yanming,LIANG Feifei,ZHANG Xuemin,WANG Fang,WU Yanzhao.Thermal expansion anomaly and spontaneous magnetostriction of Gd2Fe17 compound[J].稀土学报（英文版）,2011(08):772-775. |
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