Enhancement of magneto resistance in Mn substituted La2/3Sr1/3Mn1-xZrxO3 granular system
文献类型：期刊论文
| 作者 | Zhou, QX; Dai, MX; Wang, RH; Liu, CZ; Zhang, GQ; Ai, DF; Feng, JW |
| 刊名 | PHYSICA B-CONDENSED MATTER
 |
| 出版日期 | 2006-01-15 |
| 卷号 | 371期号:1页码:120-125 |
| 关键词 | colossal magnetoresistance X-ray diffraction sol-gel process electron properties magnetic properties |
| 英文摘要 | Granular metal/insulator (La2/3Sr1/3MnO3/Zr-contained compounds) composites were prepared by doping Zr in La2/3Sr1/3MnO3. The effects of Zr doping on structure and grain size, as well as magnetic and electric properties have been investigated. The result shows that only a very limited amount of Zr (x < 0.05) can be doped into the lattice of La2/3Sr1/3MnO3 and most Zr ions segregate as the secondary compounds (SrZrO3, La2Zr2O7 and ZrO2). The grains in the undoped sample are relatively homogeneous with single average size of about 3 mu m. For the low Zr-content samples (x = 0.05 and 0.1), however, two distinct particles of large and small sizes coexist, and these large (or small) particles have a well-defined average size of their own. For x >= 0.3, not only the grains become homogeneous again, but also their average size is significantly smaller than that of the undoped sample. It has also been found that with x increasing the paramagnetic insulator-ferromagnetic metal transition temperature T-C (or T-P) first decreases gradually (x <= 0.3) and then stays nearly constant (x > 0.3), while the resistance and low- and room-temperature magnetoresistance (MR) increase substantially. Interestingly, a large and nearly temperature-independent MR has been found in a broad temperature range (200-300 K) for the samples with x > 0.3. (c) 2005 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Physics, Condensed Matter |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | YTTRIA-STABILIZED ZIRCONIA ; GIANT MAGNETORESISTANCE ; LANTHANUM MANGANITE ; LA0.67SR0.33MNO3 ; LA0.7CA0.3MNO3 ; FILMS ; SIZE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000234784500019 |
| 公开日期 | 2015-07-28 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/4664]  |
| 专题 | 武汉物理与数学研究所_2011年以前论文发表（包括2011年） |
| 作者单位 | 1.Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China 2.Wuhan Univ, Ctr Electron Microscopy, Wuhan 430072, Peoples R China 3.Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, QX,Dai, MX,Wang, RH,et al. Enhancement of magneto resistance in Mn substituted La2/3Sr1/3Mn1-xZrxO3 granular system[J]. PHYSICA B-CONDENSED MATTER,2006,371(1):120-125. |
| APA | Zhou, QX.,Dai, MX.,Wang, RH.,Liu, CZ.,Zhang, GQ.,...&Feng, JW.(2006).Enhancement of magneto resistance in Mn substituted La2/3Sr1/3Mn1-xZrxO3 granular system.PHYSICA B-CONDENSED MATTER,371(1),120-125. |
| MLA | Zhou, QX,et al."Enhancement of magneto resistance in Mn substituted La2/3Sr1/3Mn1-xZrxO3 granular system".PHYSICA B-CONDENSED MATTER 371.1(2006):120-125. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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