SUPERCONDUCTIVITY AT 15-K IN THE METASTABLE SCNI2B2C COMPOUND

被引:47
作者
KU, HC
LAI, CC
YOU, YB
SHIEH, JH
GUAN, WY
机构
[1] Department of Physics, National Tsing Hua University, Hsinchu
来源
PHYSICAL REVIEW B | 1994年 / 50卷 / 01期
关键词
D O I
10.1103/PhysRevB.50.351
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A superconducting transition around 15-16 K is reported for metastable, as-melted ScNi2B2C samples. Zero resistivity T(c)(zero) was observed at 14.6 K with T(c)(onset) around 16.5 K. A consistent diamagnetic T(c) signal was observed around 14.8-15.6 K. The new superconducting phase was identified as isostructural to the quaternary LuNi2B2C-type phase with tetragonal lattice parameters a = 3.34 angstrom and c = 10.2 angstrom. This superconducting phase is unstable due to the extremely small Sc3+ ionic size, where the Sc atom is located in the cavity formed by the B-Ni-B-C network and no superconducting transition could be observed down to 5 K after 1050-degrees-C annealing.
引用
收藏
页码:351 / 353
页数:3
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