학술논문
Effects of Carbon Doping on Trapped Magnetic Field of MgB$_{2}$ Bulk Prepared by in-situ Hot Isostatic Pressing Method
Document Type
Periodical
Author
Source
IEEE Transactions on Applied Superconductivity IEEE Trans. Appl. Supercond. Applied Superconductivity, IEEE Transactions on. 30(4):1-6 Jun, 2020
Subject
Language
ISSN
1051-8223
1558-2515
2378-7074
1558-2515
2378-7074
Abstract
We report the effects of carbon doping on the trapped field properties of MgB$_{2}$ bulks doped with graphite (C) and B$_{4}$C, which were prepared by an in-situ hot isostatic pressing method. The trapped fields, $B_{\rm T}$'s were degraded by the graphite and B$_{4}$C doping above 15 K, which was predominantly due to the lowered $T_{\rm c}$ by the C substitution. However, the slope of $B_{\rm T}(T)$ and the irreversibility line, $B_{\rm irr}(T)$, determined from the resistive transitions indicated that the $B_{\rm T}$ of the graphite-doped bulk was expected to exceed that of the pristine bulk below 15 K. Contrary to the literature by other groups, B$_{4}$C did not enhance the vortex pinning properties.