Superconductivity at 43 K at ambient pressure in the iron-based layered compound La1-xYxFeAsOy

被引：45

作者：

Shirage, Parasharam M. ^{[1
]}

Miyazawa, Kiichi ^{[1
]}

Kito, Hijiri ^{[1
]}

Eisaki, Hiroshi ^{[1
]}

Iyo, Akira ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Nanoelect Res Inst NeRI, Tsukuba, Ibaraki 3058568, Japan

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.78.172503

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effect of Y substitution on the La-based iron oxypnictide superconductor LaFeAsO0.6 is studied. Replacement of La3+ (1.16 A) by smaller Y3+ (1.019 A) in a form of La1-xYxFeAsO0.6 results in the decrease in lattice parameters, which likely causes pressure effect into the system. Superconducting transition temperature (T-c) increases monotonically with x, eventually up to 43.1 K for x=0.5. This T-c is comparable to the highest T-c reported for Y-free F-doped LaFeAsO1-xFx under high pressure. The present results provide an alternative and much simpler way to achieve higher T-c in the La-based oxypnictide superconductors.

引用

页数：4

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