Neutron-Diffraction Measurements of Magnetic Order and a Structural Transition in the Parent BaFe2As2 Compound of FeAs-Based High-Temperature Superconductors

Q. Huang; Y. Qiu; Wei Bao; M. A. Green; J. W. Lynn; Y. C. Gasparovic; T. Wu; G. Wu; X. H. Chen

doi:10.1103/PhysRevLett.101.257003

Author(s)

Q. Huang
Y. Qiu
M. A. Green
J. W. Lynn
Y. C. Gasparovic
T. Wu
G. Wu
X. H. Chen

Detail(s)

Original language	English
Article number	257003
Journal / Publication	Physical Review Letters
Volume	101
Issue number	25
Online published	17 Dec 2008
Publication status	Published - 19 Dec 2008
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1103/PhysRevLett.101.257003 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-58049113806&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(ea5f81be-4709-4c7f-a398-790a06d84709).html

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-T_Csuperconductivity. 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)μ_B 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.

Citation Format(s)

[ RIS ] [ BibTeX ]

Neutron-Diffraction Measurements of Magnetic Order and a Structural Transition in the Parent BaFe₂As₂ Compound of FeAs-Based High-Temperature Superconductors. / Huang, Q.; Qiu, Y.; Bao, Wei et al.

In: Physical Review Letters, Vol. 101, No. 25, 257003, 19.12.2008.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

Huang, Q, Qiu, Y, Bao, W, Green, MA, Lynn, JW, Gasparovic, YC, Wu, T, Wu, G & Chen, XH 2008, 'Neutron-Diffraction Measurements of Magnetic Order and a Structural Transition in the Parent BaFe₂As₂ Compound of FeAs-Based High-Temperature Superconductors', Physical Review Letters, vol. 101, no. 25, 257003. https://doi.org/10.1103/PhysRevLett.101.257003

Huang, Q., Qiu, Y., Bao, W., Green, M. A., Lynn, J. W., Gasparovic, Y. C., Wu, T., Wu, G., & Chen, X. H. (2008). Neutron-Diffraction Measurements of Magnetic Order and a Structural Transition in the Parent BaFe₂As₂ Compound of FeAs-Based High-Temperature Superconductors. Physical Review Letters, 101(25), [257003]. https://doi.org/10.1103/PhysRevLett.101.257003

Huang Q, Qiu Y, Bao W, Green MA, Lynn JW, Gasparovic YC et al. Neutron-Diffraction Measurements of Magnetic Order and a Structural Transition in the Parent BaFe₂As₂ Compound of FeAs-Based High-Temperature Superconductors. Physical Review Letters. 2008 Dec 19;101(25):257003. Epub 2008 Dec 17. doi: 10.1103/PhysRevLett.101.257003

Huang, Q. ; Qiu, Y. ; Bao, Wei et al. / Neutron-Diffraction Measurements of Magnetic Order and a Structural Transition in the Parent BaFe₂As₂ Compound of FeAs-Based High-Temperature Superconductors. In: Physical Review Letters. 2008 ; Vol. 101, No. 25.