研究了在低磁场H≤0.8T区间下的材料La0.67Ca0.33Mn1-xTxO3(T=Fe或Ni)中的磁阻效应，发现在La0.67Ca0.33Mn1-xFexO3中用铁替代锰降低了磁阻比，但改善了磁阻随磁场变化的线性度。用少量的镍替换锰(x=0.1)时，可得到较好的低场高磁阻变化特性。
In this work,the magnetoresistance of La0.67Ca0.33Mn1-xTxO3(T=Fe or Ni)has been investigated in the low magnetic field range H≤0.8T.It has been found that the replacement of Mn by Fe lowers the low field-magnetoresistance,but improves the behavior of linearity of low field-magnetoresistance.Meanwhile the better low field-large magnetoresistance change can be observed in the low addition of Ni(x=0.1).
参考文献
| [1] | Jin S;Tiefel T H;McCormack M et al.Thousandfold change in resistivity in magnetoresistive La-Ca-Mn-O films[J].Science,1994,264:413-415. |
| [2] | Helmolt R V;Weckerg J;Holzapfel B et al.Giant negative magnetoresistance in perovskite like La2/3Ba1/3MnOx ferromagnetic films[J].Physical Review Letters,1993,71:2331-2333. |
| [3] | Ju H L;Gopalakrishnan J;Peng J L et al.Dependence of giant magnetoresistance on oxygen stoichiometry and magnetization in polycrystalline La0.67Ba0.33MnO2[J].Physical Review B,1995,51:6143-6146. |
| [4] | Jonker G H.Magnetic compounds with pervoskite structure[J].Physica,1956:702-722. |
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%