Effect of Carbon Substitution on the Superconducting Properties of Nanocarbon-, Nanodiamond- and Nano-SiC-Doped MgB2
2011; Wiley; Volume: 94; Issue: 4 Linguagem: Inglês
10.1111/j.1551-2916.2010.04163.x
ISSN1551-2916
AutoresNeson Varghese, K. Vinod, Sugathan Rahul, P. Anees, K. M. Devadas, Syju Thomas, A. Sundaresan, S. B. Roy, U. Syamaprasad,
Tópico(s)Iron-based superconductors research
ResumoJournal of the American Ceramic SocietyVolume 94, Issue 4 p. 1133-1137 Effect of Carbon Substitution on the Superconducting Properties of Nanocarbon-, Nanodiamond- and Nano-SiC-Doped MgB2 Neson Varghese, Neson Varghese National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, IndiaSearch for more papers by this authorKrishnankutty Vinod, Krishnankutty Vinod National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, IndiaSearch for more papers by this authorSugathan Rahul, Sugathan Rahul National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, IndiaSearch for more papers by this authorPazhedath Anees, Pazhedath Anees National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, IndiaSearch for more papers by this authorKavazhikathu Mohandas Devadas, Kavazhikathu Mohandas Devadas National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, IndiaSearch for more papers by this authorSyju Thomas, Syju Thomas National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, IndiaSearch for more papers by this author, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research,Bangalore 560064, IndiaSearch for more papers by this authorAthinarayanan Sundaresan, Athinarayanan Sundaresan Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research,Bangalore 560064, IndiaSearch for more papers by this authorSindhunil Barman Roy, Sindhunil Barman Roy Magnetic & Superconducting Materials Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, IndiaSearch for more papers by this authorUpendran Syamaprasad, Corresponding Author Upendran Syamaprasad National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, India†Author to whom correspondence should be addressed. e-mail: [email protected]Search for more papers by this author Neson Varghese, Neson Varghese National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, IndiaSearch for more papers by this authorKrishnankutty Vinod, Krishnankutty Vinod National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, IndiaSearch for more papers by this authorSugathan Rahul, Sugathan Rahul National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, IndiaSearch for more papers by this authorPazhedath Anees, Pazhedath Anees National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, IndiaSearch for more papers by this authorKavazhikathu Mohandas Devadas, Kavazhikathu Mohandas Devadas National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, IndiaSearch for more papers by this authorSyju Thomas, Syju Thomas National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, IndiaSearch for more papers by this author, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research,Bangalore 560064, IndiaSearch for more papers by this authorAthinarayanan Sundaresan, Athinarayanan Sundaresan Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research,Bangalore 560064, IndiaSearch for more papers by this authorSindhunil Barman Roy, Sindhunil Barman Roy Magnetic & Superconducting Materials Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, IndiaSearch for more papers by this authorUpendran Syamaprasad, Corresponding Author Upendran Syamaprasad National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, India†Author to whom correspondence should be addressed. e-mail: [email protected]Search for more papers by this author First published: 10 February 2011 https://doi.org/10.1111/j.1551-2916.2010.04163.xCitations: 10 A. Goyal—contributing editor Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract A comparative study on the effect of doping of nanocarbon (C), nanodiamond, and the well-established nano-SiC in MgB2 is carried out under identical doping levels (C: 2.6 and 5.2 wt%) and processing conditions (800°C, 2 h). The bulk samples are prepared via powder-in-sealed-tube method. The XRD analysis shows no reacted or unreacted phases in the case of lightly nano-C-doped sample while all other doped samples show unreacted or/and reacted phases. The a-axis shrinkage is observed for all doped samples, among which nano-C-doped samples show maximum shrinkage, an evidence for C substitution at B sites. The C substitution is also confirmed by the analysis of full-width at half-maximum values for (100), (101), (002), and (110) peaks which are broadened. The C substitution together with the presence of nonsuperconducting phases decreases the TC to a small extent. The JC(H) is significantly enhanced for all doped samples compared with the pure sample among which MgB1.9C0.1 (nano-C) exhibits the best performance in JC enhancement up to a field of 8 T. Citing Literature Volume94, Issue4April 2011Pages 1133-1137 RelatedInformation
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