From single-molecule magnetism to long-range ferromagnetism in Hpyr[Fe17O16(OH)(12)(py)(12)Br-4]Br-4 (Articolo in rivista)

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  • From single-molecule magnetism to long-range ferromagnetism in Hpyr[Fe17O16(OH)(12)(py)(12)Br-4]Br-4 (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Vecchini, C; Ryan, DH; Cranswick, LMD; Evangelisti, M; Kockelmann, W; Radaelli, PG; Candini, A; Affronte, M; Gass, IA; Brechin, EK; Moze, O (2008)
    From single-molecule magnetism to long-range ferromagnetism in Hpyr[Fe17O16(OH)(12)(py)(12)Br-4]Br-4
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Vecchini, C; Ryan, DH; Cranswick, LMD; Evangelisti, M; Kockelmann, W; Radaelli, PG; Candini, A; Affronte, M; Gass, IA; Brechin, EK; Moze, O (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 77 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Vecchini, C.; Affronte, M.; Moze, O.] Univ Modena, Dipartimento Fis, I-41100 Modena, Italy; [Vecchini, C.; Evangelisti, M.; Candini, A.; Affronte, M.] CNR, INFM, Natl Res Ctr S3, I-41100 Modena, Italy; [Ryan, D. H.] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada; [Cranswick, L. M. D.] NRCC, Canadian Neutron Beam Ctr, Chalk River Labs, Chalk River, ON K0J 1J0, Canada; [Kockelmann, W.; Radaelli, P. G.] Rutherford Appleton Lab, ISIS, Didcot OX11 0QX, Oxon, England; [Gass, I. A.; Brechin, E. K.] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JJ, Midlothian, Scotland (literal)
Titolo
  • From single-molecule magnetism to long-range ferromagnetism in Hpyr[Fe17O16(OH)(12)(py)(12)Br-4]Br-4 (literal)
Abstract
  • The molecular magnet Hpyr[Fe17O16(OH)(12)(py)(12)Br-4]Br-4 ('Fe-17') has a well-defined cluster spin ground state of S=35/2 at low temperatures and an axial molecular anisotropy of only D similar or equal to -0.02 K. Dipolar interactions between the molecular spins induce long-range magnetic order below 1.1 K. We report here the magnetic structure of Fe-17, as determined by unpolarized neutron diffraction experiments performed on a polycrystalline sample of deuterated Fe-17 in zero applied magnetic field. In addition, we report bulk susceptibility, magnetization, and specific heat data. The temperature dependence of the long-range magnetic order has been tracked and is well accounted for within mean-field theory. Ferromagnetic order along the crystallographic c axis of the molecular spins, as determined by the neutron diffraction experiments, is in agreement with ground-state dipolar energy calculations. (literal)
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