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| 压力及高压增氧对La2-xSmxCuO4结构及输运性质的影响 | |
| 引用本文： | 吴云龙,宋春梅,熊玉峰,李来风.压力及高压增氧对La2-xSmxCuO4结构及输运性质的影响[J].高压物理学报,2006,20(4):415-420. |
| 作者姓名： | 吴云龙 宋春梅 熊玉峰 李来风 |
| 作者单位： | 1. 中国科学院理化技术研究所,北京,100080;中国科学院研究生院,北京,100039 2. 中国科学院理化技术研究所,北京,100080;遵义师范学院物理系,贵州遵义,563002 3. 国家纳米科学研究中心,北京,100080 4. 中国科学院理化技术研究所,北京,100080 |
| 摘 要： | 对常压、高压、高压增氧条件下合成的La2-xSmxCuO4（0≤x≤2.0）结构进行了研究。常压合成样品清晰地反应出样品由T→T+T′→T′相的变化，其中，T相：0 |
| 关 键 词： | T相 T′相 高压 高温超导 R2CuO4 |
| 文章编号： | 1000-5773（2006）04-0415-06 |
| 收稿时间： | 2005-10-18 |
| 修稿时间： | 2006-01-01 |
Structure Evolution and Transport Properties of La2-xSmxCuO4 at High Pressure |
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| WU Yun-Long,SONG Chun-Mei,XIONG Yu-Feng,LI Lai-Feng.Structure Evolution and Transport Properties of La2-xSmxCuO4 at High Pressure[J].Chinese Journal of High Pressure Physics,2006,20(4):415-420. | |
| Authors: | WU Yun-Long SONG Chun-Mei XIONG Yu-Feng LI Lai-Feng |
| Institution: | 1. Technical Institute of Physics and Chemistry ,Chinese Academy of Sciences, Beijing 100080, China; 2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China ; 3. Department of Physics, Zunyi Normal College, Zunyi 563002, China; 4. National Center for Nanoscience and Technology ,Beijing 100080,China |
| Abstract: | The structure evolution and transport properties of La2-xSmxCuO4 synthesized both at atmosphere pressure and high pressure have been studied. The crystal structure changed from T phase to the T′ phase. Following treatment in high pressure of 6 GPa in 850 ℃, a slight modification in the lattice constants was observed. The results also showed that oxygen pressure tended to stabilize the T structure. The pressure caused the sample density increasing. The high oxygen pressure treatment for the T structure resulted in a drastic decrease of the resistivity at low temperature, indicating a superconductivity with Sm concentration≤0.5. |
| Keywords: | T phase T′ phase structure evolution high pressure superconductivity |
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