### Abstract

The pressure dependence on the superconducting transition temperature (T _{c} ) was investigated for the iron-based superconductors LaFeAsO _{1-x} F _{x} and SmFeAsO _{1-x} F _{x} . The T _{c} 's increase largely for LaFeAsO _{1-x} F _{x} with a small increase of pressure, while a sharp decrease of T _{c} was observed for SmFeAsO _{1-x} F _{x} . The electrical resistivity measurements reveal pressure-induced superconductivity for undoped LaFeAsO and SmFeAsO. These pressure effects seem to be related to an anisotropic decrease of the lattice constants under high pressure from the x-ray diffraction measurements up to 10 GPa for the LaFeAsO _{1-x} F _{x} system.

Original language | English |
---|---|

Pages (from-to) | 595-598 |

Number of pages | 4 |

Journal | Journal of Superconductivity and Novel Magnetism |

Volume | 22 |

Issue number | 6 |

DOIs | |

Publication status | Published - 2009 Aug |

Externally published | Yes |

### Fingerprint

### Keywords

- High-pressure
- LaFeAsO F
- Pressure-induced superconductivity
- SmFeAsO F

### ASJC Scopus subject areas

- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics

### Cite this

_{1-x}F

_{x}and SmFeAsO

_{1-x}F

_{x}

*Journal of Superconductivity and Novel Magnetism*,

*22*(6), 595-598. https://doi.org/10.1007/s10948-009-0475-8

**High-pressure studies on superconductivity in LaFeAsO _{1-x} F _{x} and SmFeAsO _{1-x} F _{x} .** / Takahashi, H.; Okada, H.; Igawa, K.; Kamihara, Yoichi; Hirano, M.; Hosono, H.; Matsubayashi, K.; Uwatoko, Y.

Research output: Contribution to journal › Article

_{1-x}F

_{x}and SmFeAsO

_{1-x}F

_{x}',

*Journal of Superconductivity and Novel Magnetism*, vol. 22, no. 6, pp. 595-598. https://doi.org/10.1007/s10948-009-0475-8

_{1-x}F

_{x}and SmFeAsO

_{1-x}F

_{x}Journal of Superconductivity and Novel Magnetism. 2009 Aug;22(6):595-598. https://doi.org/10.1007/s10948-009-0475-8

}

TY - JOUR

T1 - High-pressure studies on superconductivity in LaFeAsO 1-x F x and SmFeAsO 1-x F x

AU - Takahashi, H.

AU - Okada, H.

AU - Igawa, K.

AU - Kamihara, Yoichi

AU - Hirano, M.

AU - Hosono, H.

AU - Matsubayashi, K.

AU - Uwatoko, Y.

PY - 2009/8

Y1 - 2009/8

N2 - The pressure dependence on the superconducting transition temperature (T c ) was investigated for the iron-based superconductors LaFeAsO 1-x F x and SmFeAsO 1-x F x . The T c 's increase largely for LaFeAsO 1-x F x with a small increase of pressure, while a sharp decrease of T c was observed for SmFeAsO 1-x F x . The electrical resistivity measurements reveal pressure-induced superconductivity for undoped LaFeAsO and SmFeAsO. These pressure effects seem to be related to an anisotropic decrease of the lattice constants under high pressure from the x-ray diffraction measurements up to 10 GPa for the LaFeAsO 1-x F x system.

AB - The pressure dependence on the superconducting transition temperature (T c ) was investigated for the iron-based superconductors LaFeAsO 1-x F x and SmFeAsO 1-x F x . The T c 's increase largely for LaFeAsO 1-x F x with a small increase of pressure, while a sharp decrease of T c was observed for SmFeAsO 1-x F x . The electrical resistivity measurements reveal pressure-induced superconductivity for undoped LaFeAsO and SmFeAsO. These pressure effects seem to be related to an anisotropic decrease of the lattice constants under high pressure from the x-ray diffraction measurements up to 10 GPa for the LaFeAsO 1-x F x system.

KW - High-pressure

KW - LaFeAsO F

KW - Pressure-induced superconductivity

KW - SmFeAsO F

UR - http://www.scopus.com/inward/record.url?scp=67650095180&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=67650095180&partnerID=8YFLogxK

U2 - 10.1007/s10948-009-0475-8

DO - 10.1007/s10948-009-0475-8

M3 - Article

AN - SCOPUS:67650095180

VL - 22

SP - 595

EP - 598

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

SN - 1557-1939

IS - 6

ER -