Mn-Substitution Effects on MgB2 Superconductor
Mn-Substitution Effects on MgB2 Superconductor
复制标题
Mn 取代对 MgB2 超导体的影响
DOI：
10.1143/jpsj.70.1889
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发表时间：
2001
影响因子：
1.7
通讯作者：
A. Nakamura
中科院分区：
文献类型：
--
作者：
Sheng Xu;Y. Moritomo;K. Kato;A. Nakamura
研究了磁性杂质对Mg1-xMnxB2超导电性的影响。随着Mn含量x的增加，晶格常数c(垂直于硼片)以-1.4%(=dlnc/dx)的速度减小，而a基本不变。相变温度Tc以dTc/dx=-159K的速率随x急剧下降。这些结果表明，母体MgB2的超导状态服从磁性杂质，即Mn2+。
Effects of magnetic impurity on the superconductivity have been investigated in Mg 1- x Mn x B 2 . With increase of Mn concentration x , the lattice constant c (perpendicular to the boron sheet) decreases at a rate of -1.4 % (= dln c /d x ), while a remains nearly unchanged. The transition temperature T c steeply decreases with x at a rate of d T c /d x = - 159 K. These results suggest that superconducting state of the parent MgB 2 is amenable to the magnetic impurities, i.e., Mn 2+ .