CUED Publications database

Grain boundaries in multi-seeded melt-grown superconductors

Haindl, S and Eisterer, M and Weber, HW and Babu, NH and Cardwell, DA (2005) Grain boundaries in multi-seeded melt-grown superconductors. IEEE Transactions on Applied Superconductivity, 15. pp. 3129-3132. ISSN 1051-8223

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Abstract

Future applications of high temperature superconductors require bulk materials of a complex shape. The multi-seeded-melt-growth process (MSMG) represents a promising technique for obtaining qualitatively well oriented bulk materials with different kinds of shape. In the MSMG process, several seeds are placed on a precursor pellet, from which the growth of the bulk starts. A certain problem of the MSMG process is that grain boundaries become inevitable when the growth fronts of two neighboring seeds collide. These grain boundaries are responsible for a reduction of the critical currents and pose a problem for high current applications. By polishing the sample step by step, the influence of the grain boundaries was investigated by scanning Hall probe measurements and by the magnetoscan technique. Additionally, optical microscopy and electron microscopy were employed to investigate the details of the microstructure. © 2005 IEEE.

Item Type: Article
Uncontrolled Keywords: Grain boundaries Hall probe measurements MSMG
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:13
Last Modified: 08 Dec 2014 02:34
DOI: 10.1109/TASC.2005.848978