✦ LIBER ✦
Structural and Superconducting Property Variations with Nominal Mg Non-Stoichiometry in MgxB2 and Its Enhancement of Upper Critical Field
✍ Scribed by S. K. Chen; A. Serquis; G. Serrano; K. A. Yates; M. G. Blamire; D. Guthrie; J. Cooper; H. Wang; S. Margadonna; J. L. MacManus-Driscoll
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 430 KB
- Volume
- 18
- Category
- Article
- ISSN
- 1616-301X
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✦ Synopsis
Abstract
By applying a combination of characterisation tools, changes in structural and superconducting properties with nominal Mg non‐stoichiometry in Mg~x~B~2~ are found. The non‐stoichiometry produces enhanced in‐field critical current densities (J~c~'s) and upper critical field / irreversibility field (H~c2~/H~irr~(T)) values. Upper critical fields of ∼ 21 T (4.2 K) were obtained in nominal Mg‐deficient samples compared to ∼ 17 T (4.2 K) for near‐stoichiometric samples.