本文系统研究了室温下Tb0.3Dy0.7(Fe1-xAlx)1.95(x=0,0.05,0.1,0.15,0.2,0.25,0.3,0.35)合金中金属Al替代Fe对晶体结构、磁致伸缩、内禀磁致伸缩、各向异性和自旋重取向的影响.结果发现,x＜0.4时,Tb0.3Dy0.7(Fe1-xAlx)1.95完全保持MgCl2立方Laves相结构,晶格常数a随Al含量x的增加而增大.磁致伸缩测量发现,随着替代量x的增多磁致伸缩减小,x＞0.15时超磁致伸缩效应消失;x＜0.15时磁致伸缩在低场下(H≤40kA/m)有小幅增加,高场下迅速减小,而且易趋于饱和,说明添加少量Al有助于减小磁晶各向异性.内禀磁致伸缩λ111随[111]替代量x的增加大幅度降低.穆斯堡尔效应表明,Tb0.3Dy0.7(Fe1-xAlx)1.95合金的易磁化方向随成份和温度在{110}面逐渐偏离了立方晶体的主对称轴,即自旋重取向.室温下,当x=0.15时,Tb0.3Dy0.7(Fe1-xAlx)1.95合金中出现了少量非磁性相;x＞0.15时,合金完全呈顺磁性.
参考文献
| [1] | Clark A E.[A].North - Holland,Amsterdam,1980:531. |
| [2] | Funayama T;Kobayashi T et al.[J].Applied Physics Letters,1992,61:114. |
| [3] | Du J.;Tang CC.;Li YX.;Wu GH.;Zhan WS.;Wang JH. .Magnetostriction in twin-free single crystals TbyDy1-yFe2 with the addition of aluminum or manganese[J].Applied physics letters,1998(4):489-491. |
| [4] | Prajapati K;Jenner A G;Schulze M P;Green R D Ough .[J].Journal of Applied Physiology,1993,73:6171. |
| [5] | Xiaoping Zheng;Desgeng Xue;Fashen Li.[J].兰州大学学报（自然科学版）,2001(04):31. |
| [6] | Shih J.C.;Chen C.A.;Fang J.S.;Chin T.S. .Effect of beryllium addition on magnetostriction of the Tb0.3Dy0.7Fe2 alloy[J].Journal of Magnetism and Magnetic Materials,1999(1/2):101-106. |
| [7] | Dhilsha R R;Rama Rao K V S .[J].Journal of Applied Physics,1993,73:1380. |
| [8] | Prajapati K.;Jenner A.G. .Magnetoelastic behaviour of aluminium substituted Terfenol-D at elevated temperatures[J].IEEE Transactions on Magnetics,1995(6):3976-3978. |
| [9] | Atzmony U;Dariel M P .[J].PHYSICAL REVIEW B,1873,7:7. |
| [10] | Dublon G;Atzmony U;Dariel M P;Shaked H .[J].Physical Review B,1975,12:4628. |
| [11] | Atzmony U;Dariel M P .[J].Physical Review B,1974,10:2060. |
| [12] | Bowden G J;Bunbury D St P;Synder R E .[J].Journal of Physics C:Solid State Physics,1968,2:1367. |
| [13] | Atzmony U;Dariel M P .[J].PHYSICAL REVIEW B,1976,113:4006. |
| [14] | Senthil Kumar M;Reddy K V;Rama K V S .[J].Physical Review B,1995,52:6542. |
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%