Universal relationship between crystallinity and irreversibility field of MgB2 -: art. no. 212502

被引：126

作者：

Yamamoto, A ^{[1
]}

Shimoyama, J ^{[1
]}

Ueda, S ^{[1
]}

Katsura, Y ^{[1
]}

Iwayama, I ^{[1
]}

Horii, S ^{[1
]}

Kishio, K ^{[1
]}

机构：

[1] Univ Tokyo, Dept Superconduct, Bunkyo Ku, Tokyo 1138656, Japan

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 21期

关键词：

D O I：

10.1063/1.1937991

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The relationship between irreversibility field, H-irr, and crystallinity of MgB2 bulks including carbon substituted samples was studied. The H-irr was found to increase with an increase of full width at half maximum (FWHM) of MgB2 (110) peak, which corresponds to distortion of honeycomb boron sheet, and their universal correlation was discovered even including carbon substituted samples. Excellent J(c) characteristics under high magnetic fields were observed in samples with large FWHM of (110) due to the enhanced intraband scattering and strengthened grain boundary flux pinning. The relationship between crystallinity and H-irr can explain the large variation of H-irr for MgB2 bulks, tapes, single crystals, and thin films. (c) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

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