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Comparison of $$J$$c characteristics in PIT wires based on BaFe$$_{2}$$As$$_{2}$$ with different substitutions

PIT法BaFe$$_{2}$$As$$_{2}$$超伝導線の$$J$$cに及ぼす化合物の影響

為ヶ井 強*; Pyon, S.*; Ding, Q. P.*; 井上 啓*; 小林 啓紀*; 土屋 雄司*; Sun, Y.*; 梶谷 秀樹; 小泉 徳潔

Tamegai, Tsuyoshi*; Pyon, S.*; Ding, Q. P.*; Inoue, Hiroshi*; Kobayashi, Hiroki*; Tsuchiya, Yuji*; Sun, Y.*; Kajitani, Hideki; Koizumi, Norikiyo

鉄系超伝導体において、化合物の臨界電流密度($$J$$c)への影響を調査した。この中で、(Ba,K)Fe$$_{2}$$As,P2及びBa(Fe,Co)$$_{2}$$As$$_{2}$$が、比較的高いJcを示すことが分かった。さらに、これらの線に、120MPa, 600$$^{circ}$$Cの等方圧加熱接合(HIP)処理を施すことで、さらに$$J$$cを向上でき、最大で32,000A/cm$$^{2}$$(4.2K)と、従来の$$J$$cに比べて一桁以上高いJcを得ることができた。

The author studied the effect of chemical compound for superconducting performance ($$J$$c) of iron-based superconductors. As a result, it was revealed that BaFe$$_{2}$$As$$_{2}$$ showed high Jc. And more, BaFe$$_{2}$$As$$_{2}$$ showed higer $$J$$c such as 32,000A/cm$$^{2}$$ (4.2K) by being applied of 120 MPa of hot isostatic pressure (HIP). Thus, higher $$J$$c performance could be achieved.

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