Superconducting properties of nanocrystalline MgB2 thin films made by an in situ annealing process

被引：72

作者：

Zeng, XH

Sukiasyan, A

Xi, XX

Hu, YF

Wertz, E

Li, Q

Tian, W

Sun, HP

Pan, XQ

Lettieri, J

Schlom, DG

Brubaker, CO

Liu, ZK

Li, Q

机构：

[1] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[2] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

[3] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[4] Brookhaven Natl Lab, Div Mat & Chem Sci, Upton, NY 11973 USA

来源：

APPLIED PHYSICS LETTERS | 2001年 / 79卷 / 12期

关键词：

D O I：

10.1063/1.1405431

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied the structural and superconducting properties of MgB2 thin films made by pulsed-laser deposition followed by in situ annealing. The cross-sectional transmission electron microscopy reveals a nanocrystalline mixture of textured MgO and MgB2 with very small grain sizes. A zero-resistance transition temperature (T(c)0) of 34 K and a zero-field critical current density (J(c)) of 1.3x10(6) A/cm(2) were obtained. The irreversibility field was similar to8 T at low temperatures, although severe pinning instability was observed. The result is a step towards making the in situ deposition process a viable technique for MgB2 Josephson junction technologies. (C) 2001 American Institute of Physics.

引用

页码：1840 / 1842

页数：3

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