Acoustic measurement of the low-energy excitations in Nd2-xCexCuO4 (Articolo in rivista)

Type
Label
  • Acoustic measurement of the low-energy excitations in Nd2-xCexCuO4 (Articolo in rivista) (literal)
Anno
  • 2003-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/S0038-1098(03)00038-3 (literal)
Alternative label
  • F. Cordero (1), C.R. Grandini (2) and M. Ferretti (3) (2003)
    Acoustic measurement of the low-energy excitations in Nd2-xCexCuO4
    in Solid state communications (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • F. Cordero (1), C.R. Grandini (2) and M. Ferretti (3) (literal)
Pagina inizio
  • 601 (literal)
Pagina fine
  • 605 (literal)
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  • 125 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • (04806J0) 125 p.601-605 2003 (literal)
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  • 5 (literal)
Note
  • Scopu (literal)
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  • (1) CNR, Area della Ricerca Roma-Tor Vergata, Istituto di Acustica \"O.M. Corbino\", Via del Fosso del Cavaliere 100, I-00133 Rome, Italy (2) Universidade Estadual Paulista, Departamento de Fisica, 17.033-360 Bauru, SP, Brazil (3) Universita` di Genova, Dipartimento di Chimica e Chimica Industriale, and Unita` INFM-Genova, Via Dodecanneso 31, I-16146 Genoa, Italy (literal)
Titolo
  • Acoustic measurement of the low-energy excitations in Nd2-xCexCuO4 (literal)
Abstract
  • The complex dynamic Young's modulus of ceramic Nd2-xCexCuO4 with x=0, 0.05 and 0.20 has been measured from 1.5 to 100K at frequencies of 1-10kHz. In the undoped sample the modulus starts decreasing below 20K, instead of approaching a constant value as in a normal solid. The modulus minimum has been interpreted in terms of paraelastic contribution from the relaxation of the Nd3+ 4f electrons between the levels of the ground state doublet, which is split by the interaction with the antiferromagnetically ordered Cu sublattice. The value of the splitting is found to be 0.34meV, in excellent agreement with inelastic neutron scattering, infrared and specific heat experiments. With doping, the anomaly shifts to lower temperature and decreases in amplitude, consistently with a reduction of the local field from the Cu sublattice. (literal)
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