Superconductivity in oxygen-added Zr5Pt3
Superconductivity in oxygen-added Zr5Pt3
复制标题
添加氧的 Zr5Pt3 的超导性
DOI：
10.1088/2053-1591/aad9cf
复制
发表时间：
2018
影响因子：
2.3
通讯作者：
Kitagawa Jiro
中科院分区：
文献类型：
--
作者：
Hamamoto Shusuke;Kitagawa Jiro
Mn 5Si 3型结构提供了一种间隙化学.最近的报道表明，在Nb基Mn 5Si 3型化合物中加入间隙原子可以增强超导电性，这促使我们研究了在Mn 5Si 3型Zr 5 Pt 3中加入氧的影响。随着氧含量的增加，母体Zr 5 Pt 3的超导临界温度从6.4K单调降低到Zr 5 Pt 3 Ox（x= 0.6）的3.2K.当x从0.6进一步增加到2.5，超过氧位的完全占据（x= 1.0）时，样品变成由Zr 5 Pt 3 O 0.5 - 0.6、ZrPt和ZrO 2组成的多相。然而，在x= 2.5时，超导临界温度略微增加到4.8 K。金相观察表明，
Mn 5 Si 3-type structure has been offering an interstitial chemistry. Recent report of enhancement of superconductivity in a Nb-based Mn 5 Si 3-type compound by addition of an interstitial atom motivated us to investigate the effect of oxygen-addition in Mn 5 Si 3-type Zr 5 Pt 3. The superconducting critical temperature of 6.4 K in the parent Zr 5 Pt 3 is monotonously reduced to 3.2 K in Zr 5 Pt 3 O x (x= 0.6) with increasing oxygen-content. As x is further increased from 0.6 to 2.5, exceeding the full occupancy of oxygen site (x= 1.0), samples become multi-phases composed of Zr 5 Pt 3 O∼ 0.5− 0.6, ZrPt and ZrO 2. However, the superconducting critical temperature slightly increases to 4.8 K at x= 2.5. The metallographic observation has revealed a change of microstructure at