X-RAY-DIFFRACTION OF NONUNIFORM GEXSI1-XSI STRAINED-LAYER SUPERLATTICES
文献类型：期刊论文
| 作者 | LI, JH ; MAI, ZH ; CUI, SF |
| 刊名 | JOURNAL OF APPLIED PHYSICS
 |
| 出版日期 | 1993 |
| 卷号 | 73期号:11页码:7955 |
| 关键词 | ROCKING CURVES HETEROSTRUCTURES GAS |
| ISSN号 | 0021-8979 |
| 通讯作者 | LI, JH (reprint author), CHINESE ACAD SCI,INST PHYS,POB 603-79,BEIJING 100080,PEOPLES R CHINA. |
| 中文摘要 | Using an unconventional reduction method, high-pressure sintering at 6.0 GPa and about 600-degrees-C for 20 min, we have produced high-quality n-type Ln1.85Ce0.15CUO4-y (Ln = Pr, Sm, and Eu) superconductors from the as-prepared materials. The samples show higher critical temperatures, higher superconducting phase fractions, and much lower resistances in the normal state than those synthesized by conventional methods. The increase of critical temperature in Eu1.85Ce0.15CUO4-y is Most obvious with an onset temperature T(c)on and zero-resistance temperature T(c)0 of 28.4 and 23.3 K, respectively. High-pressure sintering seems to be effective on the modulation of the fine crystal and electronic structures of n-type systems. In particular, metallic resistance versus temperature behaviors in normal states similar to those found in single crystals and epitaxial films are observed in Sm1.85Ce0.15CUO4-y and Eu1.85Ce0.15CUO4-y, in sharp contrast to the semiconductorlike behaviors in the conventionally prepared samples. From transmission electron microscopy studies, it is found that the compacting and regrowth of the polycrystal under high-pressure sintering greatly improves the weak links at grain boundaries. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-23 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/46721]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | LI, JH,MAI, ZH,CUI, SF. X-RAY-DIFFRACTION OF NONUNIFORM GEXSI1-XSI STRAINED-LAYER SUPERLATTICES[J]. JOURNAL OF APPLIED PHYSICS,1993,73(11):7955. |
| APA | LI, JH,MAI, ZH,&CUI, SF.(1993).X-RAY-DIFFRACTION OF NONUNIFORM GEXSI1-XSI STRAINED-LAYER SUPERLATTICES.JOURNAL OF APPLIED PHYSICS,73(11),7955. |
| MLA | LI, JH,et al."X-RAY-DIFFRACTION OF NONUNIFORM GEXSI1-XSI STRAINED-LAYER SUPERLATTICES".JOURNAL OF APPLIED PHYSICS 73.11(1993):7955. |
入库方式： OAI收割
来源：物理研究所
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