Analysis of FeySe1-xTex thin films grown by radio frequency sputtering

被引：22

作者：

Speller, S. C. ^{[1
]}

Aksoy, C. ^{[1
,2
]}

Saydam, M. ^{[1
,2
]}

Taylor, H. ^{[1
]}

Burnell, G. ^{[3
]}

Boothroyd, A. T. ^{[4
]}

Grovenor, C. R. M. ^{[1
]}

机构：

[1] Univ Oxford, Dept Mat, Oxford OX1 2JD, England

[2] Karadeniz Tech Univ, Trabzon, Turkey

[3] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England

[4] Univ Oxford, Dept Phys, Oxford OX1 2JD, England

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2011年 / 24卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

SUPERCONDUCTIVITY; BI2TE3;

D O I：

10.1088/0953-2048/24/7/075023

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Superconducting thin films of FeySe1-xTex have been successfully grown on a variety of single-crystal substrate materials by radio frequency sputtering, and the effect of processing conditions on the microstructural development and superconducting properties has been investigated. The degree of unit cell anisotropy (c/a ratio), which is known to be linked to the superconducting transition temperature, is found to be sensitive to both Te and Fe content. However, the Te and Fe content cannot be varied independently, as the stable concentration of excess Fe is found to increase with Te content. Large scale compositional variations are found to exist in some samples, and it is believed that sub-micron scale chemical inhomogeneities are present in all samples. Post-deposition heat treatments carried out on the thin films indicate that the ternary Fe(Se, Te) phase is not very thermodynamically stable, partially transforming into Fe(Se, Te)(2) upon heating at modest temperatures for short times.

引用

页数：10

共 38 条

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