Qiu, Y., Bao, Wei, Huang, Q., Yildirim, T., Simmons, J. M., Green, M.A., Lynn, J. W., Gasparovic, Y. C., Li, J., Wu, T., and others. (2008) Crystal Structure and Antiferromagnetic Order inNdFeAsO1?xFx(x=0.0and 0.2) Superconducting Compounds from Neutron Diffraction Measurements. Physical Review Letters, 101 (25). p. 257002. ISSN 0031-9007. (doi:10.1103/PhysRevLett.101.257002) (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:51081)
| 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://10.1103/PhysRevLett.101.257002 |
Abstract
The transition temperature T C ?26??K of the recently discovered superconductor LaFeAsO 1?x F x is extremely sensitive to the lanthanide ion, reaching 55 K for the Sm containing oxypnictides. Therefore, it is important to determine how the moment on the lanthanide affects the overall magnetism in these systems. Here we report a neutron diffraction study of the Nd oxypnictides. Long-ranged antiferromagnetic order is apparent in NdFeAsO below 1.96 K. Rietveld refinement shows that both Fe and Nd magnetic ordering are required to describe the observed data with the staggered moment 1.55(4)? B /Nd and 0.9(1)? B /Fe at 0.3 K. The other structural properties such as the tetragonal-orthorhombic distortion are found to be very similar to those in LaFeAsO. Neither the magnetic ordering nor the structural distortion occur in the superconducting sample NdFeAsO 0.80 F 0.20 at any temperatures down to 1.5 K.
| Item Type: | Article |
|---|---|
| DOI/Identification number: | 10.1103/PhysRevLett.101.257002 |
| Subjects: |
Q Science > QC Physics > QC173.45 Condensed Matter REF2014 Units of Assessment > Main panel C > C19 Business and Management Studies > QC173.45 Condensed Matter Q Science > QD Chemistry > QD478 Solid State Chemistry |
| Institutional Unit: | Schools > School of Engineering, Mathematics and Physics > Physics and Astronomy |
| Former Institutional Unit: |
Functional Materials Group Divisions > Division of Natural Sciences > Physics and Astronomy
|
| Depositing User: | Giles Tarver |
| Date Deposited: | 19 Oct 2015 14:10 UTC |
| Last Modified: | 20 May 2025 09:40 UTC |
| Resource URI: | https://kar.kent.ac.uk/id/eprint/51081 (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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