对La1-xCaxMnO3(x=0.3,0.5)多晶材料的巨磁电阻效应及低温高磁场下的电脉冲诱导电阻可逆变化(EPIR)效应进行了研究,并对两者之间的区别进行了分析.实验结果表明,La1-xCaxMnO3(x=0.3和0.5)多晶材料在低温高磁场下仍具有EPIR效应,电阻在相同电脉冲下的变化率不随温度和施加磁场与否发生变化,表现出不同于巨磁电阻效应的变化规律.结合之前的研究结果,发现巨磁电阻效应是由于磁场造成磁矩的有序并继而造成电子的退局域化引起的,而EPIR效应则是由于电脉冲诱导氧离子迁移,导致载流子浓度变化引起的.
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.Science,1994,264(5157):413-415. |
| [2] | Elbio D,Takashi H,Adriana M.Colossal magneto resistant materials:the key role of phase separation.Physics Reports,2001,344(1/2/3):1-153. |
| [3] | Adriana M,Seiji Y,Elbio D.Phase separation scenario for manganese oxides and related materials.Science,1999,283(5410):2034-2040. |
| [4] | Asamitsu A,Tomioka Y,Kuwahara H,et al.Current switching of resistive states in magnetoresistive manganites.Nature,1997,388(6637):50-52. |
| [5] | Liu S Q,Wu N J,Ignatiev A.Electric-pulse-induced reversible resistance change effect in magnetoresistive films.Appl.Phys.Lett.,2000,76(19):2749-2751. |
| [6] | Dong R,Wang Q,Chen L D,et al.Retention behavior of the electricpulse-induced reversible resistance change effect in Ag-La0.7Ca0.3MnO3-Pt sandwiches.Appl.Phys.Lett.,2005,86(17):172107-1-3. |
| [7] | Aoyama K,Waku K,Asanuma A,et al.Electric-pulse-induced reflectance change in the thin film of perovskite manganite.Appl.Phys.Lett.,2004,85(7):1208-1211. |
| [8] | Odagawa A,Sato H,Inoue I H,et al.Colossal electroresistance of a Pr0.7Ca0.3MnO3 thin film at room temperature.Phys.Rev.B,2004,70(22):224403-1-4. |
| [9] | 王群,董睿,陈立东(Wang Qun,et al).用化学溶液沉积方法制备Pr0.7Ca0.3MnO3薄膜.无机材料学报(Journal of Inorganic Materials),2004,19(5):1087-1092. |
| [10] | Nian Y B,Strozier J,Wu N J,et al.Evidence for an oxygen diffusion model for the electric pulse induced resistance change effect in transition-metal oxides.Phys.Rev.Lett.,2007,98(14):146403-1-4. |
| [11] | Millis A J,Littlewood P B,Shraiman B I.Double exchange alone does not explain the resistivity of La1-xSrxMnO3.Phys.Rev.Lett.,1995,74(25):5144-5147. |
| [12] | Krzysztof S,Wolfgang S,Gustav B,et al.Switching the electrical resistance of individual dislocations in single-crystalline SrTiO3.Nature Materials,2006,5(12):312-320. |
| [13] | Chen X,Wu N J,Strozier J,et al.Spatially extended nature of resistive switching in perovskite oxide thin films.Appl.Phys.Lett.,2006,89(6):063507-1-3. |
| [14] | Watanabe Y,Bednorz JG,Bietsch A,et al.Current-driven insulatorconductor transition and nonvolatile memory in chromium-doped SrTiO3 single crystals.Appl.Phys.Lett.,2001,78(23):3738-3740. |
| [15] | Tulina N A,Sirotkin V V.Electron instability in doped manganites based heterojunctions.Physica C,2004,400(3):105-110. |
| [16] | Baikalov A,Wang Y Q,Lorenz B,et al.Field-driven hysteretic and reversible resistive switch at the Ag-Pr0.7Ca0.3MnO3 interface.Appl.Phys.Lett.,2003,83(5):957-959. |
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%