Structural and magnetic phase diagram of CeFeAsO1- xFx and its relation to high-temperature superconductivity

Zhao, Jun, Huang, Q, De La Cruz, Clarina, Li, Shilang, Lynn, J. W., Chen, Y, Green, M.A., Chen, G. F., Li, G, Li, Z, and others. (2008) Structural and magnetic phase diagram of CeFeAsO1- xFx and its relation to high-temperature superconductivity. Nature Materials, 7 (12). pp. 953-959. ISSN 1476-4660. (doi:10.1038/nmat2315) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:40475)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL: http://dx.doi.org/10.1038/nmat2315

Abstract

Recently, high-transition-temperature (high-Tc) superconductivity was discovered in the iron pnictide RFeAsO1-xFx (R, rare-earth metal) family of materials. We use neutron scattering to study the structural and magnetic phase transitions in CeFeAsO1-xFx as the system is tuned from a semimetal to a high-Tc superconductor through fluorine (F) doping, x. In the undoped state, CeFeAsO develops a structural lattice distortion followed by a collinear antiferromagnetic order with decreasing temperature. With increasing fluorine doping, the structural phase transition decreases gradually and vanishes within the superconductivity dome near x=0.10, whereas the antiferromagnetic order is suppressed before the appearance of superconductivity for x>0.06, resulting in an electronic phase diagram remarkably similar to that of the high-Tc copper oxides. Comparison of the structural evolution of CeFeAsO1-xFx with other Fe-based superconductors suggests that the structural perfection of the Fe–As tetrahedron is important for the high-Tc superconductivity in these Fe pnictides.

Item Type:	Article
DOI/Identification number:	10.1038/nmat2315
Subjects:	Q Science Q Science > QC Physics
Divisions:	Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User:	Mark Green
Date Deposited:	07 Mar 2014 00:05 UTC
Last Modified:	05 Nov 2024 10:24 UTC
Resource URI:	https://kar.kent.ac.uk/id/eprint/40475 (The current URI for this page, for reference purposes)

University of Kent Author Information

Green, M.A..

Creator's ORCID:	https://orcid.org/0000-0002-7886-6205
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