A spin resonance investigation of magnetism and dynamics in the charge-transfer salts beta (Articolo in rivista)

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Label
  • A spin resonance investigation of magnetism and dynamics in the charge-transfer salts beta (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • Narduzzo A, Coldea A, Ardavan A, Singleton J, Pardi L, Bercu V, Akutsu-Sato A, Akutsu H, Turner S (2006)
    A spin resonance investigation of magnetism and dynamics in the charge-transfer salts beta
    in Journal of low temperature physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Narduzzo A, Coldea A, Ardavan A, Singleton J, Pardi L, Bercu V, Akutsu-Sato A, Akutsu H, Turner S (literal)
Pagina inizio
  • 581 (literal)
Pagina fine
  • 584 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 142 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Oxford, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England Los Alamos Natl Lab, NHMFL, Los Alamos, NM USA CNR, Ist Proc Chim Fis, I-56124 Pisa, Italy Univ Tokyo, Res Ctr Spectrochem, Grad Sch Sci, Bunkyo Ku, Tokyo 1130033, Japan Himeji Inst Technol, Dept Mat Sci, Grad Sch, Himeji, Hyogo 6781297 Japan Himeji Inst Technol, Fac Sci, Himeji, Hyogo 6781297 Japan Royal Inst Great Britain, Davy Faraday Res Lab, London, England (literal)
Titolo
  • A spin resonance investigation of magnetism and dynamics in the charge-transfer salts beta (literal)
Abstract
  • We report a spin resonance study of the family of quasi-two-dimensional organic (super)conductors beta\"-(BEDT-TTF)(4)[(H3O)M(C2O4)(3)]S, where M is a 3d transition metal ion and S is a host solvent molecule. The spin systems for M = Cr3+ (S = 3/2) and M = Fe3+ (S = 5/2) are investigated by means of both resonant and field modulation techniques in the frequency range between 50 and 313 GHz. The role of the different solvent molecules in determining the degree of spin-orbit coupling and the local symmetry at the metal ion site is established. The low temperature behaviour of intensities, positions and widths of the resonant lines shows significant modifications of the spin-orbit coupling, and of the inter- and intra-ionic spin-spin interactions. Despite the onset of a weak antiferromagnetic internal field at low temperature, the ultimate narrowing of the lines suggests spin-lattice interactions may still be the dominant relaxation process. Diamagnetic screening in the mixed state of the superconducting samples for fields parallel to the quasi-two-dimensional layers induces additional lineshifts only below B = 2.5 T and T = 4 K, determining the threshold of full field penetration within the anion layers. (literal)
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