The influence of Cu dopant (x) and sintering temperature (Ts) on the transport properties of La2/3 Ca1/3 Mn1- xCuxO3 series samples prepared by Sol-Gel technique was investigated. X-ray diffraction patterns show that all the samples with different Cu dopant and sintering temperatures (Ts) are of single phase without obvious lattice distortion. Experimental results indicate that the insulator-metal transition temperature is directly related to the sintering temperature and Cu dopant x. It is interesting to observe that a proper amount of Cu dopant can substantially improve magnetoresistance effects.
参考文献
| [1] | R Mahesh;RMahendiran;AKRaychaudhuri;CNRRao .Effect of Particle Size on the Giant Magnetoresistance of LaO·CaO·3MnO3[J].Applied Physics Letters,1996,68:2291.7. |
| [2] | L E Hueso;J Rivas;F Rivadula;M A Lopez- Quintela .Tuning of Colossal Magnetoresistance via Grain Size Change in La067Cao33MnO3[J].Journal of Applied Physics,1999,86:3881. |
| [3] | F Rivadulla et al.Effect of Mn-site Doping on the Magnetoresistance Compound La067Ca033Mn1 - xAxO3(A= Co, Cr;x<<01)[J].Physical Review B,1996,54:1305. |
| [4] | S L Yuan et al.Magnetic Behavior in the Cu - doped Samples ofLa2/3Ca1/3Mn1-xCuxO3(0 << x << 03)[J].Solid State Communications,2001,117(03):661. |
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%