Possible superconductivity above 25K in single-crystalline co-doped BaFe2As2
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- Nakajima Yasuyuki
- Department of Applied Physiscs, The University of Tokyo JST, Transformative Research-Project on Iron Pnictides (TRIP)
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- Taen Toshihiro
- Department of Applied Physiscs, The University of Tokyo
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- Tamegai Tsuyoshi
- Department of Applied Physiscs, The University of Tokyo JST, Transformative Research-Project on Iron Pnictides (TRIP)
書誌事項
- タイトル別名
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- Possible Superconductivity above 25 K in Single-Crystalline Co-Doped BaFe<SUB>2</SUB>As<SUB>2</SUB>
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説明
We present the superconducting properties of single-crystalline Ba(Fe0.9Co0.1)2As2 by measuring its magnetization, resistivity, upper critical field, Hall coefficient, and magneto-optical images. The magnetization measurements reveal a fish-tail hysteresis loop at high temperatures and a relatively high critical current density above Jc=105 A/cm2 at low temperatures. The upper critical field determined by resistive transition is anisotropic with an anisotropic parameter of ∼3.5. Hall effect measurements indicate that Ba(Fe0.9Co0.1)2As2 is a multiband system and that the mobility of electrons is dominant. Magneto-optical imaging reveals a prominent Bean-like penetration of vortices, although there is a slight inhomogeneity in a sample. Moreover, we observe distinct superconductivity above 25 K, which leads us to speculate that a higher transition temperature can be realized by fine-tuning the Co-doping level.
収録刊行物
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- Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｐｈｙｓｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ｊａｐａｎ
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Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｐｈｙｓｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ｊａｐａｎ 78 (2), 023702-023702, 2009
一般社団法人 日本物理学会
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詳細情報 詳細情報について
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- CRID
- 1390282679173483264
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- NII論文ID
- 130005437339
- 110007097897
- 210000107648
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- NII書誌ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 9799981
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- 本文言語コード
- en
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