Mn-substitution effects on MgB2 superconductor

被引：42

作者：

Xu, S ^{[1
]}

Moritomo, Y

Kato, K

Nakamura, A

机构：

[1] Nagoya Univ, CIRSE, Nagoya, Aichi 4648601, Japan

[2] Nagoya Univ, Dept Crystalline Mat Sci, Nagoya, Aichi 4648603, Japan

[3] JASRI, Mikazuki, Hyogo 6795198, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2001年 / 70卷 / 07期

关键词：

MgB2; chemical substitution;

D O I：

10.1143/JPSJ.70.1889

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Effects of magnetic impurity on the superconductivity have been investigated in Mg1-xMnxB2. With increase of Mn concentration x, the lattice constant c (perpendicular to the boron sheet) decreases at a rate of -1.4% (= d ln c/dx), while a remains nearly unchanged. The transition temperature Tc steeply decreases with x at a rate of dT(c)/dx = -159 K. These results suggest that superconducting state of the parent MgB2 is amenable to the magnetic impurities, i.e., Mn2+.

引用

页码：1889 / 1891

页数：3

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