This title appears in the Scientific Report :
2011
Please use the identifier:
http://hdl.handle.net/2128/10927 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.84.054419 in citations.
Strong coupling of Sm and Fe magnetism in SmFeAsO as revealed by magnetic x-ray scattering
Strong coupling of Sm and Fe magnetism in SmFeAsO as revealed by magnetic x-ray scattering
The magnetic structures adopted by the Fe and Sm sublattices in SmFeAsO have been investigated using element-specific x-ray resonant and nonresonant magnetic scattering techniques. Between 110 and 5 K, the Sm and Fe moments are aligned along the c and a directions, respectively, according to the sam...
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Personal Name(s): | Nandi, S. |
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Su, Y. / Xiao, Y. / Price, S. / Wang, X. F. / Chen, X. H. / Herrero-Martín, J. / Mazzoli, C. / Walker, H. C. / Paolasini, L. / Francoual, S. / Shukla, D. K. / Strempfer, J. / Chatterji, T. / Kumer, C. M. N. / Mittal, R. / Ronnow, H. M. / Rüegg, Ch. / McMorrow, D. F. / Brückel, T. | |
Contributing Institute: |
JCNS-FRM-II; JCNS-FRM-II JARA-FIT; JARA-FIT Streumethoden; JCNS-2 Streumethoden; PGI-4 Neutronenstreuung; JCNS-1 |
Published in: | Physical Review B Physical review / B, 84 84 (2011 2011) 5 5, S. 054419 054419 |
Imprint: |
College Park, Md.
APS
2011
|
Physical Description: |
054419 |
DOI: |
10.1103/PhysRevB.84.054419 |
Document Type: |
Journal Article |
Research Program: |
Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) Grundlagen für zukünftige Informationstechnologien |
Series Title: |
Physical Review B
84 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.84.054419 in citations.
The magnetic structures adopted by the Fe and Sm sublattices in SmFeAsO have been investigated using element-specific x-ray resonant and nonresonant magnetic scattering techniques. Between 110 and 5 K, the Sm and Fe moments are aligned along the c and a directions, respectively, according to the same magnetic representation Gamma(5) and the same propagation vector (1 0 1/2). Below 5 K, the magnetic order of both sublattices changes to a different magnetic structure, and the Sm moments reorder in a magnetic unit cell equal to the chemical unit cell. Modeling of the temperature dependence for the Sm sublattice, as well as a change in the magnetic structure below 5 K, provides clear evidence of a surprisingly strong coupling between the two sublattices, and indicates the need to include anisotropic exchange interactions in models of SmFeAsO and related compounds. |