Spin dynamics of heterometallic Cr7M wheels (M=Mn, Zn, Ni) probed by inelastic neutron scattering (Articolo in rivista)

Type
Label
  • Spin dynamics of heterometallic Cr7M wheels (M=Mn, Zn, Ni) probed by inelastic neutron scattering (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.71.174407 (literal)
Alternative label
  • R. Caciuffo; T. Guidi; G. Amoretti; S. Carretta; E. Liviotti; P. Santini; C. Mondelli; G. Timco; C.A. Muryn; R.E.P. Winpenny (2005)
    Spin dynamics of heterometallic Cr7M wheels (M=Mn, Zn, Ni) probed by inelastic neutron scattering
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • R. Caciuffo; T. Guidi; G. Amoretti; S. Carretta; E. Liviotti; P. Santini; C. Mondelli; G. Timco; C.A. Muryn; R.E.P. Winpenny (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 71 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 17 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Politecn Marche, Dipartimento Fis & Ingn Mat & Terr, I-60131 Ancona, Italy Univ Parma, Dipartimento Fis, I-43100 Parma, Italy INFM-OGG, Institut Laue Langevin F-38042 Grenoble, France Univ Manchester, Dept Chem, Manchester M13 9PL, Lancs, England (literal)
Titolo
  • Spin dynamics of heterometallic Cr7M wheels (M=Mn, Zn, Ni) probed by inelastic neutron scattering (literal)
Abstract
  • Inelastic neutron scattering has been applied to the study of the spin dynamics of Cr-based antiferromagnetic octanuclear rings where a finite total spin of the ground state is obtained by substituting one Cr3+ ion (s =3/2) with Zn (s=0), Mn (s=5/2), or Ni (s=1) dications. Energy and intensity measurements for several intramultiplet and intermultiplet magnetic excitations allow us to determine the spin wave functions of the investigated clusters. Effects due to the mixing of different spin multiplets have been considered. Such effects proved to be important to correctly reproduce the energy and intensity of magnetic excitations in the neutron spectra. On the contrary to what is observed for the parent homonuclear Cr-8 ring, the symmetry of the first excited spin states is such that anticrossing conditions with the ground state can be realized in the presence of an external magnetic field. Heterometallic Cr7M wheels are therefore good candidates for macroscopic observations of quantum effects. (literal)
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