Pressure studies for 1111 and 11 type iron-based superconductors

Hiroki Takahashi, Hironari Okada, Hiroyuki Takahashi, Yoichi Kamihara, Satoru Matsuishi, Masahiro Hirano, Hideo Hosono, Yoshikazu Mizuguch, Yosihiko Takano

研究成果: Conference contribution

抄録

In the recent development of the studies in iron-based superconductors, high-pressure experiments have been played an important role. Large enhancement of Tc with applying pressure and pressure-induced superconductivity were reported in LaFeAsO1-xFx. In this work, electrical, magnetic and structural measurements on 1111 type Ca(Fe1-xCo x)AsF and 11 type Fe(Se1-xTex)0.92 under high pressure have been performed. For Ca(Fe1-xCo x)AsF, the substitution of Co suppressed the magnetic and structural transitions and raised superconductivity. Pressure-induced superconductivity was observed for x = 0.0 and 0.05. The highest Tc was obtained in parent compound under high pressure, in contrast to LaFeAsO1-xF x. These results suggest that the substitution of Co increases carrier concentration and induces disorder in the FeAs superconducting layer. For FeTe0.92, pressure-induced superconductivity was not detected under high pressure up to 19 GPa, although the resistive anomaly due to the structural and magnetic phase transition was suppressed by applying pressure.

本文言語English
ホスト出版物のタイトルRecent Advances and New Discoveries in High-Temperature Superconductivity
出版社Materials Research Society
ページ7-17
ページ数11
ISBN(印刷版)9781618394903
DOI
出版ステータスPublished - 2010 1 1
外部発表はい
イベント2010 MRS Spring Meeting - San Francisco, CA, United States
継続期間: 2010 4 52010 4 9

出版物シリーズ

名前Materials Research Society Symposium Proceedings
1254
ISSN(印刷版)0272-9172

Other

Other2010 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period10/4/510/4/9

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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