Neutron-Diffraction Measurements of Magnetic Order and a Structural Transition in the ParentBaFe2As2Compound of FeAs-Based High-Temperature Superconductors

Huang, Q. and Qiu, Y. and Bao, Wei and Green, M.A. and Lynn, J.W. and Gasparovic, Y.C. and Wu, T. and Wu, G. and Chen, X.H. (2008) Neutron-Diffraction Measurements of Magnetic Order and a Structural Transition in the ParentBaFe2As2Compound of FeAs-Based High-Temperature Superconductors. Physical Review Letters, 101 (25). p. 257003. ISSN 0031-9007. (doi:https://doi.org/10.1103/PhysRevLett.101.257003) (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)

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Official URL
http://doi.org/10.1103/PhysRevLett.101.257003

Abstract

The recent discovery of superconductivity in (Ba,K)Fe2As2, which crystallizes in the ThCr2Si2 (122) structure as compared with the LnFeAsO (Ln is lanthanide) systems that possess the ZrCuSiAs (1111) structure, demonstrates the exciting potential of the FeAs-based materials for high-TC superconductivity. Here we report neutron diffraction studies that show a tetragonal-to-orthorhombic distortion associated with the onset of q=(101) antiferromagnetic order in BaFe2As2, with a saturation moment 0.87(3)μB per Fe that is orientated along the longer a axis of the ab planes. The simultaneous first-order structural and magnetic transition is in contrast with the separated transitions previously reported in the 1111-type materials. The orientational relation between magnetic alignment and lattice distortion supports a multiorbital nature for the magnetic order.

Item Type: Article
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences
Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 19 Oct 2015 14:05 UTC
Last Modified: 25 Aug 2017 11:51 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/51080 (The current URI for this page, for reference purposes)
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