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Crystallinity and flux pinning properties of MgB2 bulks

โœ Scribed by A. Yamamoto; J. Shimoyama; S. Ueda; Y. Katsura; I. Iwayama; S. Horii; K. Kishio

Publisher
Elsevier Science
Year
2006
Tongue
English
Weight
223 KB
Volume
445-448
Category
Article
ISSN
0921-4534

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โœฆ Synopsis

The relationship between flux pinning properties and crystallinity of MgB 2 bulks was systematically studied. Improved flux pinning properties under high fields were observed for samples with low crystallinity. Increased impurity scattering due to strain and defects in lattice corresponding to the degraded crystallinity was considered to enhance flux pinning strength at grain boundaries. Low-temperature synthesis and carbon substitution were confirmed to be effective for degrading crystallinity of MgB 2 bulks, resulting in high critical current properties under high fields.

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