Neutron irradiation of MgB2 bulk superconductors

被引：102

作者：

Eisterer, M ^{[1
]}

Zehetmayer, M

Tönies, S

Weber, HW

Kambara, M

Babu, NH

Cardwell, DA

Greenwood, LR

机构：

[1] Austrian Univ, Inst Atom, A-1020 Vienna, Austria

[2] Univ Cambridge, Interdisciplinary Res Ctr Superconduct, Cambridge CB3 0HE, England

[3] Pacific NW Natl Lab, Richland, WA 99352 USA

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2002年 / 15卷 / 02期

关键词：

Crystal microstructure - Current density - High temperature reactors - Magnesium compounds - Neutron irradiation - Sintering;

D O I：

10.1088/0953-2048/15/2/101

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Sintered samples of MgB2 were irradiated in a fission reactor. Defects in the bulk microstructure are produced during this process mainly by the B-10(n,alpha)Li-7 reaction while collisions of fast neutrons with the lattice atoms induce much less damage. Self-shielding effects turn out to be very important and lead to a highly inhomogeneous defect distribution in the irradiated samples. The resulting disorder enhances the normal state resistivity and the upper critical field. The irreversibility line shifts to higher fields at low temperatures and the measured critical current densities increase following irradiation.

引用

页码：L9 / L12

页数：4

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