Superconductivity in Iron Oxypnictide Induced by F-Doping

Yoichi Kamihara; H. Hosono

doi:10.1016/B978-0-12-801639-8.00019-2

Superconductivity in Iron Oxypnictide Induced by F-Doping

Yoichi Kamihara, H. Hosono

Department of Applied Physics and Physico-Informatics

Research output: Chapter in Book/Report/Conference proceeding › Chapter

2 Citations (Scopus)

Abstract

In the history of superconductors, Fe-based superconductor LnFePnO_1-xF_x (1111) has the highest T_c at ~58K except Cu-based oxide superconductors. Electron doping by substitution of O^2- with F^- was essential to induce superconductivity. Local structures around iron are found to have a good empirical relation to T_c. Maximum T_c is observed for 1111 materials having nearly regular tetrahedral FeAs₄ local structures. The T_c and upper critical field of 1111 compounds are very attractive for power cable under high magnetic fields, although fabrication of practical superconducting wires is a tough challenge due to the difficulty in controlling the F contents during a processing for ex-situ powder-in-tube method.

Original language	English
Title of host publication	Photonic and Electronic Properties of Fluoride Materials: Progress in Fluorine Science Series
Publisher	Elsevier Inc.
Pages	423-446
Number of pages	24
ISBN (Electronic)	9780128017951
ISBN (Print)	9780128016398
DOIs	https://doi.org/10.1016/B978-0-12-801639-8.00019-2
Publication status	Published - 2016 Mar 15

Keywords

Bulk superconductivity
Ex-situ powder-in-tube (PIT) method
Fluorine doping
Iron-based superconductors
LaFeAsO
Rare earth
SmFeAsO
Superconducting critical current
Superconducting critical magnetic field
Superconducting wires

ASJC Scopus subject areas

Chemistry(all)

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Cite this

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title = "Superconductivity in Iron Oxypnictide Induced by F-Doping",

abstract = "In the history of superconductors, Fe-based superconductor LnFePnO1-xFx (1111) has the highest Tc at ~58K except Cu-based oxide superconductors. Electron doping by substitution of O2- with F- was essential to induce superconductivity. Local structures around iron are found to have a good empirical relation to Tc. Maximum Tc is observed for 1111 materials having nearly regular tetrahedral FeAs4 local structures. The Tc and upper critical field of 1111 compounds are very attractive for power cable under high magnetic fields, although fabrication of practical superconducting wires is a tough challenge due to the difficulty in controlling the F contents during a processing for ex-situ powder-in-tube method.",

keywords = "Bulk superconductivity, Ex-situ powder-in-tube (PIT) method, Fluorine doping, Iron-based superconductors, LaFeAsO, Rare earth, SmFeAsO, Superconducting critical current, Superconducting critical magnetic field, Superconducting wires",

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KW - Iron-based superconductors

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KW - Rare earth

KW - SmFeAsO

KW - Superconducting critical current

KW - Superconducting critical magnetic field

KW - Superconducting wires

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