Sung Hun Wee et al 2008 Supercond. Sci. Technol. 21 092001 doi:10.1088/0953-2048/21/9/092001
Sung Hun Wee1,2, Amit Goyal1, Yuri L Zuev1 and Claudia Cantoni1
Show affiliationsHigh temperature superconducting (HTS) wires capable of carrying large critical currents with low dissipation levels in high applied magnetic fields are needed for a wide range of applications. In particular, for electric power applications involving rotating machinery, such as large-scale motors and generators, a high critical current, Ic, and a high engineering critical current density, JE, in applied magnetic fields in the range of 3–5 Tesla (T) at 65 K are required. In addition, exceeding the minimum performance requirements needed for these applications results in a lower fabrication cost, which is regarded as crucial to realize or enable many large-scale bulk applications of HTS materials. Here we report the fabrication of short segments of a potential superconducting wire comprised of a 4 µm thick YBa2Cu3O7−δ (YBCO) layer on a biaxially textured substrate with a 50% higher Ic and JE than the highest values reported previously. The YBCO film contained columns of self-assembled nanodots of BaZrO3 (BZO) roughly oriented along the c-axis of YBCO. Although the YBCO film was grown at a high deposition rate, three-dimensional self-assembly of the insulating BZO nanodots still occurred. For all magnetic field orientations, minimum Ic and JE at 65 K, 3 T for the wire were 353 A cm−1 and 65.4 kA cm−2, respectively.
84.71.Mn Superconducting wires, fibers, and tapes
Issue 9 (September 2008)
Received 7 April 2008, in final form 5 May 2008
Published 20 June 2008
Sung Hun Wee et al 2008 Supercond. Sci. Technol. 21 092001
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