The effects of C substitution and disorder on the field dependent critical current density in MgB2 with nano-SiC additions.
In this work, nano sized SiC powders were mixed with Mg and B and reacted by either a one-step insitu or two-step method resulted in different level of C substitution. X-ray diffraction shows the presence of Mg2Si signifying that the reaction between SiC and Mg occurred leading to the release of C i...
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| Format: | Article |
| Language: | English English |
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Elsevier
2010
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| Online Access: | http://psasir.upm.edu.my/id/eprint/17130/ http://psasir.upm.edu.my/id/eprint/17130/1/The%20effects%20of%20C%20substitution%20and%20disorder%20on%20the%20field%20dependent%20critical%20current%20density%20in%20MgB2%20with%20nano.pdf |
| _version_ | 1848843156720713728 |
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| author | Chen, Soo Kien X, Xu Kim, J H Shi, Xue Dou Driscoll, Judith |
| author_facet | Chen, Soo Kien X, Xu Kim, J H Shi, Xue Dou Driscoll, Judith |
| author_sort | Chen, Soo Kien |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | In this work, nano sized SiC powders were mixed with Mg and B and reacted by either a one-step insitu or two-step method resulted in different level of C substitution. X-ray diffraction shows the presence of Mg2Si signifying that the reaction between SiC and Mg occurred leading to the release of C in samples reacted in one-step method. Moreover, the much reduced value of a-axis indicates C substitution took place. Resistivity measurements showed higher intragrain scattering owing to a higher density of defects and/or impurities. These samples also show higher Hirr and Hc2 at 20 K in comparison to samples with mainly unreacted SiC (hence lower C substitution). More importantly, their Jc’s are more insensitive to high magnetic field (>4 T) at 6 K. However, at 20 K the effect of C content on Jc(H) is less pronounced. Finally, the order of magnitude of Jc(H) at both 6 K and 20 K is rather dominated by pinning.
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| first_indexed | 2025-11-15T08:10:33Z |
| format | Article |
| id | upm-17130 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T08:10:33Z |
| publishDate | 2010 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-171302015-11-03T07:34:18Z http://psasir.upm.edu.my/id/eprint/17130/ The effects of C substitution and disorder on the field dependent critical current density in MgB2 with nano-SiC additions. Chen, Soo Kien X, Xu Kim, J H Shi, Xue Dou Driscoll, Judith In this work, nano sized SiC powders were mixed with Mg and B and reacted by either a one-step insitu or two-step method resulted in different level of C substitution. X-ray diffraction shows the presence of Mg2Si signifying that the reaction between SiC and Mg occurred leading to the release of C in samples reacted in one-step method. Moreover, the much reduced value of a-axis indicates C substitution took place. Resistivity measurements showed higher intragrain scattering owing to a higher density of defects and/or impurities. These samples also show higher Hirr and Hc2 at 20 K in comparison to samples with mainly unreacted SiC (hence lower C substitution). More importantly, their Jc’s are more insensitive to high magnetic field (>4 T) at 6 K. However, at 20 K the effect of C content on Jc(H) is less pronounced. Finally, the order of magnitude of Jc(H) at both 6 K and 20 K is rather dominated by pinning. Elsevier 2010 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/17130/1/The%20effects%20of%20C%20substitution%20and%20disorder%20on%20the%20field%20dependent%20critical%20current%20density%20in%20MgB2%20with%20nano.pdf Chen, Soo Kien and X, Xu and Kim, J H and Shi, Xue Dou and Driscoll, Judith (2010) The effects of C substitution and disorder on the field dependent critical current density in MgB2 with nano-SiC additions. Physica C: Superconductivity, 470 (20). pp. 1211-1215. ISSN 0921-4534 Superconductors. Nanotechnology. http://dx.doi.org/10.1016/j.physc.2010.05.076 English |
| spellingShingle | Superconductors. Nanotechnology. Chen, Soo Kien X, Xu Kim, J H Shi, Xue Dou Driscoll, Judith The effects of C substitution and disorder on the field dependent critical current density in MgB2 with nano-SiC additions. |
| title | The effects of C substitution and disorder on the field dependent critical current density in MgB2 with nano-SiC additions. |
| title_full | The effects of C substitution and disorder on the field dependent critical current density in MgB2 with nano-SiC additions. |
| title_fullStr | The effects of C substitution and disorder on the field dependent critical current density in MgB2 with nano-SiC additions. |
| title_full_unstemmed | The effects of C substitution and disorder on the field dependent critical current density in MgB2 with nano-SiC additions. |
| title_short | The effects of C substitution and disorder on the field dependent critical current density in MgB2 with nano-SiC additions. |
| title_sort | effects of c substitution and disorder on the field dependent critical current density in mgb2 with nano-sic additions. |
| topic | Superconductors. Nanotechnology. |
| url | http://psasir.upm.edu.my/id/eprint/17130/ http://psasir.upm.edu.my/id/eprint/17130/ http://psasir.upm.edu.my/id/eprint/17130/1/The%20effects%20of%20C%20substitution%20and%20disorder%20on%20the%20field%20dependent%20critical%20current%20density%20in%20MgB2%20with%20nano.pdf |