Home | About Journal | Web Links | E-mail Alerts | RSS RSS Icon | Browse
Previous Article Next Article

Possible hydrogen doping and enhancement of Tc (=35  K) in a LaFeAsO-based superconductor

Source: Appl. Phys. Lett. 96, 072514 (2010); doi:10.1063/1.3319508

Published 19 February 2010

KEYWORDS and PACS
Keywords
PACS
  • 74.62.Dh
    Effects of crystal defects, doping and substitution on superconducting transition temperature
  • 61.72.up
    Doping and impurity implantation in other materials
  • 76.60.-k
    Nuclear magnetic resonance and relaxation (condensed matter)
  • 74.81.-g
    Inhomogeneous superconductors and superconducting systems
  • 74.10.+v
    Occurrence of superconductivity
  • YEAR: 2010
RELATED DATABASES

To view database links for this article,
you need to log in.
To view database links for this article,
you need to log in.
PUBLICATION DATA
Publisher:
AIP is a member of CrossRef AIP
K. Miyazawa,1,2 S. Ishida,1,3 K. Kihou,1,4 P. M. Shirage,1 M. Nakajima,1,3 C. H. Lee,1,4 H. Kito,1,4 Y. Tomioka,1,4 T. Ito,1,4 H. Eisaki,1,4 H. Yamashita,5 H. Mukuda,4,5 K. Tokiwa,2 S. Uchida,3,4 and A. Iyo1,2,4
1National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan
2Department of Applied Electronics, Tokyo University of Science, Noda, Chiba 275-8510, Japan
3Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
4Transformative Research-Project on Iron Pnictides (TRIP), JST, 5, Sanbancho, Chiyoda, Tokyo 102-0075, Japan
5Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
We report that the incorporation of hydroxide ions (OH)− significantly enhances the superconducting transition temperature (Tc) in the LnFeAsO-based superconductors (Ln1111: Ln=La, Ce, and Pr). For La1111, Tc of the (OH)− incorporated sample synthesized using high-pressure technique becomes 35 K, which is higher by 7 K than the typical optimally doped La1111 superconductors. Similar enhancement in Tc is also observed for Ce1111 and Pr1111. 1H-NMR measurement have confirmed the existence of hydrogen atoms in the samples. Accompanying the (OH)− incorporation, the lattice parameters are largely contracted, down to the values which have never been attained by any other dopings/substitutions. ©2010 American Institute of Physics
History: Received 27 December 2009; accepted 21 January 2010; published 19 February 2010
Permalink: http://link.aip.org/link/?APPLAB/96/072514/1

REFERENCES (13)

For access to fully linked references, you need to log in. For access to fully linked references, you need to Log in.
  1. Y. Kamihara, T. Watanabe, M. Hirano, and H. Hosono, J. Am. Chem. Soc. 130, 3296 (2008).
  2. Z. A. Ren, J. Yang, W. Lu, W. Yi, X. L. Shen, Z. C. Li, G. C. Che, X. L. Dong, L. L. Sun, F. Zhou, and Z. X. Zhao, EPL 82, 57002 (2008).
  3. C. Wang, L. Li, S. Chi, Z. Zhu, Z. Ren, Y. Li, Y. Wang, X. Lin, Y. Luo, S. Jiang, X. Xu, G. Cao, and Z. Xu, EPL. 83, 67006 (2008).
  4. Z. A. Ren, G. C. Che, X. L. Dong, J. Yang, W. Lu, W. Yi, X. L. Shen, Z. C. Li, L. L. Sun, F. Zhou, and Z. X. Zhao, EPL 83, 17002 (2008).
  5. H. Kito, H. Eisaki, and A. Iyo, J. Phys. Soc. Jpn. 77, 063707 (2008).
  6. A. S. Sefat, A. Huq, M. A. McGuire, R. Jin, B. C. Sales, D. Mandrus, L. M. D. Cranswick, P. W. Stephens, and K. H. Stone, Phys. Rev. B 78, 104505 (2008).
  7. C. Wang, S. Jiang, Q. Tao, Z. Ren, Y. Li, L. Li, C. Feng, J. Dai, G. Cao, and Z. A. Xu, EPL 86, 47002 (2009).
  8. P. M. Shirage, K. Miyazawa, M. Ishikado, K. Kihou, C. H. Lee, N. Takeshita, H. Matsuhata, R. Kumai, Y. Tomioka, T. Ito, H. Kito, H. Eisaki, S. Shamoto, and A. Iyo, Physica C 469, 355 (2009).
  9. F. Kanetake and H. Mukuda (unpublished).
  10. K. Miyazawa, K. Kihou, P. M. Shirage, C. H. Lee, H. Kito, H. Eisaki, and A. Iyo, J. Phys. Soc. Jpn. 78, 034712 (2009).
  11. H. Hiramatsu, T. Katase, T. Kamiya, M. Hirano, and H. Hosono, Phys. Rev. B 80, 052501 (2009).
  12. R. D. Shannon, Acta Crystallogr., Sect. A: Cryst. Phys., Diffr., Theor. Gen. Crystallogr. 32, 751 (1976).
  13. Y. Mizuguchi, K. Deguchi, S. Tsuda, T. Yamaguchi, and Y. Takano, “Moisture-induced superconductivity in FeTe0.8S0.2,” Appl. Phys. Lett. (submitted).

CITING ARTICLES
For access to citing articles, you need to log in.
For access to citing articles, you need to Log in.
ADVERTISEMENT