Chemical doping and improved flux pinning in Hg-based superconductors

被引：48

作者：

Kishio, K ^{[1
]}

Shimoyama, J ^{[1
]}

Yoshikawa, A ^{[1
]}

Kitazawa, K ^{[1
]}

Chmaissem, O ^{[1
]}

Jorgensen, JD ^{[1
]}

机构：

[1] ARGONNE NATL LAB,ARGONNE,IL 60439

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 1996年 / 105卷 / 5-6期

关键词：

D O I：

10.1007/BF00753889

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Chemical doping of a small amount (0.02 similar to 0.3 of rhenium (Re) ion into HgBa2Can-1CunOy(n=1 similar to 4) has been studied. The flux pinning strength in these Hg-based superconductors is significantly enhanced compared to the undoped parent materials. Neutron diffraction analysis of representative samples (n=3) revealed that Re partially substitutes the Hg-site with octahedrally fully coordinated oxygen atoms, giving rise to the stabilization of Hg(Re)O layer and reduction of this blocking layer thickness. Associated with the expected hybridization of Re-5d and O-2p orbitals and possible metallization of the HS(Re)O layer, the improved flux pinning behavior is considered to be caused by the decrease of the electromagnetic anisotropy and the enhanced interlayer superconducting coupling strength.

引用

页码：1359 / 1365

页数：7

共 10 条

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