Iron spin-reorientation transition in NdFeAsO.
J Phys Condens Matter
; 24(25): 256007, 2012 Jun 27.
Article
en En
| MEDLINE
| ID: mdl-22641142
The low-temperature magnetic structure of NdFeAsO has been revisited using neutron powder diffraction and symmetry analysis using the Sarah representational analysis program. Four magnetic models with one magnetic variable for each of the Nd and Fe sublattices were tested. The best fit was obtained using a model with Fe moments pointing along the c-direction, and Nd moments along the a-direction. This signals a significant interplay between rare-earth and transition metal magnetism, which results in a spin-reorientation of the Fe sublattice upon ordering of the Nd moments. All models that fit the data well, including collinear models with more than one magnetic variable per sublattice, were found to have an Fe moment of 0.5 µ(B) and a Nd moment of 0.9 µ(B), demonstrating that the low-temperature Fe moment is not substantially enhanced compared to the spin-density wave state.
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01-internacional
Base de datos:
MEDLINE
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
J Phys Condens Matter
Asunto de la revista:
BIOFISICA
Año:
2012
Tipo del documento:
Article
Pais de publicación:
Reino Unido