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

H. Takahashi; H. Okada; K. Igawa; Y. Kamihara; M. Hirano; H. Hosono; K. Matsubayashi; Y. Uwatoko

doi:10.1007/s10948-009-0475-8

High-pressure studies on superconductivity in LaFeAsO _1-x F _x and SmFeAsO _1-x F _x

H. Takahashi, H. Okada, K. Igawa, Y. Kamihara, M. Hirano, H. Hosono, K. Matsubayashi, Y. Uwatoko

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

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	https://doi.org/10.1007/s10948-009-0475-8
Publication status	Published - 2009 Aug
Externally published	Yes

Keywords

High-pressure
LaFeAsO F
Pressure-induced superconductivity
SmFeAsO F

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1007/s10948-009-0475-8

Cite this

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title = "High-pressure studies on superconductivity in LaFeAsO 1-x F x and SmFeAsO 1-x F x ",

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.",

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AU - Takahashi, H.

AU - Okada, H.

AU - Igawa, K.

AU - Kamihara, Y.

AU - Hirano, M.

AU - Hosono, H.

AU - Matsubayashi, K.

AU - Uwatoko, Y.

PY - 2009/8

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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.

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