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High-Pressure Studies for Hydrogen Substituted CaFeAsF1−x H x and SmFeAsO1−x H x

  • H. TakahashiEmail author
  • T. Tomita
  • H. Soeda
  • M. Ebata
  • K. Okuma
  • T. Hanna
  • Y. Muraba
  • S. Matsuishi
  • H. Hosono
Original Paper

Abstract

Recently hydrogen substituted CaFeAsF1−x H x and SmFeAsO1−x H x have been successfully synthesized. Hydrogen atoms are incorporated as H ions at the F sites. However, H substitution for non-superconducting CaFeAsF does not induce superconductivity because of isovalent substitution. Since CaFeAsF is known to exhibit superconductivity under high pressure, electrical resistivity and X-ray diffraction measurements have been carried out for CaFeAsH under high pressure in order to study the superconductivity for the material having Ca–H layer. Electrical resistivity measurements also have been done for SmFeAsO1−x H x from under-doped to over-doped region (x=0.5).

Keywords

High pressure H ions CaFeAsF1−xHx SmFeAsO1−xHx 

Notes

Acknowledgements

This work was supported by “Strategic Research Base Development” Program for Private Universities (2009, S0901022) subsidized by the Ministry of Education, Culture, Sports, Science and Technology (MEXT).

References

  1. 1.
    Kamihara, Y., Watanabe, T.Y., Hirano, M., Hosono, H.: J. Am. Chem. Soc. 130, 3296 (2008) CrossRefGoogle Scholar
  2. 2.
    Takahashi, H., Igawa, K., Arii, K., Kamihara, Y., Hirano, M., Hosono, H.: Nature 453, 376 (2008) ADSCrossRefGoogle Scholar
  3. 3.
    Hanna, T., Muraba, Y., Matsuishi, S., Kodama, K., Shamoto, S., Hosono, H.: Phys. Rev. B 84, 024521 (2011) ADSCrossRefGoogle Scholar
  4. 4.
    Matsuishi, S., Inoue, Y., Nomura, T., Yanagi, H., Hirano, M., Hosono, H.: J. Am. Chem. Soc. 130, 14428 (2008) CrossRefGoogle Scholar
  5. 5.
    Okada, H., Takahashi, H., Matsuishi, S.Y., Hirano, M., Hosono, H., Matsubayashi, K., Uwatoko, Y., Takahashi, H.: Phys. Rev. B 81, 054507 (2010) ADSCrossRefGoogle Scholar
  6. 6.
    Eremets, M.I., Trojan, I.A., Medvedev, S.A., Tse, J.S., Tao, Y.: Science 14, 1506 (2008) ADSCrossRefGoogle Scholar
  7. 7.
    Xiao, Y., Su, Y., Mutual, R., Chattered, T., Hansen, T., Kumar, C.M.N., Matsuishi, S., Hosono, H., Berkeley, Th.: Phys. Rev. B 79, 060504 (2009) ADSCrossRefGoogle Scholar
  8. 8.
    Nomura, T., Inoue, Y., Matsuishi, S., Hirano, M., Kim, J.E., Kato, K., Takata, M., Hosono, H.: Supercond. Sci. Technol. 22, 055016 (2009) ADSCrossRefGoogle Scholar
  9. 9.
    Takahashi, H., Okada, H., Igawa, K., Kamihara, Y., Hirano, M., Hosono, H.: Physica C 469, 413 (2009) ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • H. Takahashi
    • 1
    • 2
    Email author
  • T. Tomita
    • 1
    • 2
  • H. Soeda
    • 1
  • M. Ebata
    • 1
  • K. Okuma
    • 1
  • T. Hanna
    • 3
  • Y. Muraba
    • 3
  • S. Matsuishi
    • 3
  • H. Hosono
    • 3
    • 4
  1. 1.Department of Physics, College of Humanities and SciencesNihon UniversitySetagaya-kuJapan
  2. 2.Transformative Research-Project on Iron Pnictides (TRIP)Japan Science and Technology Agency (JST)TokyoJapan
  3. 3.Materials and Structures LaboratoryTokyo Institute of TechnologyYokohamaJapan
  4. 4.Frontier Research CenterTokyo Institute of TechnologyYokohamaJapan

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