YBa 2 Cu 3 O 6+x (Y123) wires with Er 2 BaCuO 5 (Er211) and Y 2 BaCuO 5 (Y211) additions were textured by a zone-melting process. The microstructure and magnetic J c of wire segments taken from different sections of textured wires were analysed and compared. Microstructural analysis on the Er211-doped wires confirms that Er211 dissolves in the melt and results in the formation of a Y z Er (1-z )Ba 2 Cu 3 O 6+x superconducting phase upon solidification which shows improved magnetic properties over Y211 doped wires.
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Balkin et al. (1994) studied this question.
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