As-75 NQR signature of the isoelectronic nature of ruthenium for iron substitution in LaFe1-xRuxAsO (Articolo in rivista)

Type
Label
  • As-75 NQR signature of the isoelectronic nature of ruthenium for iron substitution in LaFe1-xRuxAsO (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/pssb.201350237 (literal)
Alternative label
  • Mazzani, Marcello; Bonfa, Pietro; Allodi, Giuseppe; Sanna, Samuele; Martinelli, Alberto; Palenzona, Andrea; Manfrinetti, Pietro; Putti, Marina; De Renzi, Roberto (2014)
    As-75 NQR signature of the isoelectronic nature of ruthenium for iron substitution in LaFe1-xRuxAsO
    in Physica status solidi. B, Basic research
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Mazzani, Marcello; Bonfa, Pietro; Allodi, Giuseppe; Sanna, Samuele; Martinelli, Alberto; Palenzona, Andrea; Manfrinetti, Pietro; Putti, Marina; De Renzi, Roberto (literal)
Pagina inizio
  • 974 (literal)
Pagina fine
  • 979 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 251 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 6 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 5 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • University of Parma; University of Pavia; Consiglio Nazionale delle Ricerche (CNR); University of Genoa (literal)
Titolo
  • As-75 NQR signature of the isoelectronic nature of ruthenium for iron substitution in LaFe1-xRuxAsO (literal)
Abstract
  • We have investigated the effects of the isovalent ruthenium substitution in LaFe1-xRuxAsO, by extensive As-75 NQR (nuclear quadrupole resonance) measurements, supported by DFT (density functional theory) calculations, in order to characterize both the lattice and electronic structure details. The evidence for five different local configurations around the arsenic site emerges upon increasing ruthenium for iron substitution. DFT calculations confirm the attribution of the measured electric field gradients (EFGs) to ruthenium atom occupancies (0, 1, 2, 3, and 4) on the nearest-neighbour sites of arsenic. It is found that the low-frequency (Ru-free) NQR peak remains almost unaffected upon ruthenium substitution, providing an experimental confirmation that ruthenium does not introduce delocalized carriers in the iron plane. (literal)
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