Magneto-Seebeck effect in REFeAsO (RE=rare earth) compounds: probing the magnon drag scenario (Articolo in rivista)

Type
Label
  • Magneto-Seebeck effect in REFeAsO (RE=rare earth) compounds: probing the magnon drag scenario (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.90.134421 (literal)
Alternative label
  • Caglieris F., Braggio A., Pallecchi I., Provino A., Pani M., Lamura G., Jost A., Zeitler U., Galleani D Agliano E, Manfrinetti P, Putti M. (2014)
    Magneto-Seebeck effect in REFeAsO (RE=rare earth) compounds: probing the magnon drag scenario
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Caglieris F., Braggio A., Pallecchi I., Provino A., Pani M., Lamura G., Jost A., Zeitler U., Galleani D Agliano E, Manfrinetti P, Putti M. (literal)
Pagina inizio
  • 134421 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.134421 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 90 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Genoa, Dept Phys, I-16146 Genoa, Italy; SPIN CNR, I-16152 Genoa, Italy; Univ Genoa, Dept Chem, I-16146 Genoa, Italy; Radboud Univ Nijmegen, High Field Magnet Lab, NL-6525 ED Nijmegen, Netherlands (literal)
Titolo
  • Magneto-Seebeck effect in REFeAsO (RE=rare earth) compounds: probing the magnon drag scenario (literal)
Abstract
  • We investigate the Seebeck effect in RFeAsO (R=rare earth) compounds as a function of temperature and magnetic field up to 30 T. The Seebeck curves are characterized by a broad negative bump around 50 K, which is sample dependent and strongly enhanced by the application of a magnetic field. A model for the temperature and field dependence of the magnon drag contribution to the Seebeck effect by antiferromagnetic (AFM) spin fluctuation is developed. It accounts for the magnitude and scaling properties of such bump feature in our experimental data in LaFeAsO. This analysis accounts for the apparent inconsistency of literature Seebeck effect data on these compounds and has the potential to extract precious information on the coupling between electrons and AFM spin fluctuations in these parent compound systems, with implications on the pairing mechanism of the related superconducting compounds. (literal)
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