### 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 |
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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 |

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### 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