Spin gap of a pressure-induced superconductor Sr2Ca12Cu24O41 at an optimum pressure of 3.8 GPa

被引：1
|
作者：
Fujiwara, N. [1 ]
Fujimaki, Y. [2 ]
Uchida, S. [2 ]
Matsumoto, T. [3 ]
Uwatoko, Y. [4 ]
机构：
[1] Kyoto Univ, Grad Sch Human & Environm Studies, Kyoto 6068501, Japan
[2] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan
[3] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
[4] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2008年 / 69卷 / 12期
关键词：
NMR; Superconductivity;
D O I：
10.1016/j.jpcs.2008.06.032
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Nuclear magnetic resonance (NMR) on Cu-63 nuclei was performed in a pressure-induced superconductor Sr2Ca12Cu24O41 at an optimum pressure of 3.8 GPa. A pressure of 3.8 GPa was achieved by improving a piston-cylinder-type pressure cell and developing a NMR probe with a steady-load control system. We found that the spin gap still exists even at the optimum pressure. The spin gap was almost the same at pressures below 3.5 GPa on the pressure-temperature phase diagram, whereas it decreased rather drastically above 3.5 GPa. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3171 / 3173
页数：3
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