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arXiv · 1103.5815

Biaxially textured cobalt-doped BaFe2As2 films with high critical current density over 1 MA/cm2 on MgO-buffered metal-tape flexible substrates

Takayoshi Katase·Hidenori Hiramatsu·Vladimir Matias·Chris Sheehan·Yoshihiro Ishimaru·Toshio Kamiya·Keiichi Tanabe·Hideo Hosono
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Abstract

High critical current densities (Jc) > 1 MA/cm2 were realized in cobalt-doped BaFe2As2 (BaFe2As2:Co) films on flexible metal substrates with biaxially-textured MgO base-layers fabricated by an ion-beam assisted deposition technique. The BaFe2As2:Co films showed small in-plane crystalline misorientations (delta fai BaFe2As2:Co) of ~3o regardless of doubly larger misorientaions of the MgO base-layers (delta fai MgO = 7.3o), and exhibited high self-field Jc up to 3.5 MA/cm2 at 2 K. These values are comparable to that on MgO single crystals and the highest Jc among iron pnictide superconducting tapes and wires ever reported. High in-field Jc suggests the existence of c-axis correlated vortex pinning centers.

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Takayoshi Katase, Hidenori Hiramatsu, Vladimir Matias, Chris Sheehan, Yoshihiro Ishimaru, Toshio Kamiya, Keiichi Tanabe, Hideo Hosono. 2011-06-20. Biaxially textured cobalt-doped BaFe2As2 films with high critical current density over 1 MA/cm2 on MgO-buffered metal-tape flexible substrates. https://doi.org/10.1063/1.3599844

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