Magnetic Order Through Super-Superexchanges in the Polar Magnetoelectric Organic-Inorganic Hybrid Cr[(D3N-(CH2)2-PO3)(Cl)(D2O)] (Articolo in rivista)

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  • Magnetic Order Through Super-Superexchanges in the Polar Magnetoelectric Organic-Inorganic Hybrid Cr[(D3N-(CH2)2-PO3)(Cl)(D2O)] (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/ic301874v (literal)
Alternative label
  • Gwilherm Nénert, Hyun-Joo Koo, Claire V. Colin, Elvira M. Bauer Carlo Bellitto , Clemens Ritter, Guido Righini, and Myung-Hwan Whangbo (2013)
    Magnetic Order Through Super-Superexchanges in the Polar Magnetoelectric Organic-Inorganic Hybrid Cr[(D3N-(CH2)2-PO3)(Cl)(D2O)]
    in Inorganic chemistry
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Gwilherm Nénert, Hyun-Joo Koo, Claire V. Colin, Elvira M. Bauer Carlo Bellitto , Clemens Ritter, Guido Righini, and Myung-Hwan Whangbo (literal)
Pagina inizio
  • 753 (literal)
Pagina fine
  • 760 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://pubs.acs.org/doi/abs/10.1021/ic301874v (literal)
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  • 52 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 2 (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • Diffraction Group BP 156, Institut Laue-Langevin, 6 rue Jules Horowitz, F-38042 Grenoble Cedex 9, France Department of Chemistry and Research Institute of Basic Science, Kyung Hee University, Seoul 130-701, Republic of Korea Institut Néel, CNRS et Université Joseph Fourier, BP 166, 38042 Grenoble, France Istituto di Struttura della Materia-C.N.R. Sez. Montelibretti, via Salaria km 29.300, P.O. Box 10, 00015 Monterotondo (RM), Italy. Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States (literal)
Titolo
  • Magnetic Order Through Super-Superexchanges in the Polar Magnetoelectric Organic-Inorganic Hybrid Cr[(D3N-(CH2)2-PO3)(Cl)(D2O)] (literal)
Abstract
  • The crystal and magnetic structures of the organic-inorganic hybrid compound Cr(II) ammoniumethylphosphonate chloride monohydrate, Cr[D3N-(CH2)2-PO3)(Cl)(D2O)] (1), have been studied by temperature-dependent neutron powder diffraction and superconducting quantum interference device (SQUID) magnetometry. The compound represents a rare example of a magnetoelectric polar organic-inorganic hybrid solid, containing high spin Cr2+ ions (S = 2) and is a canted antiferromagnet (weak ferromagnet) below TN = 5.5 K. The neutron powder diffraction pattern recorded at T = 10 K, shows that the partially deuterated compound crystallizes in the same non centrosymmetric monoclinic space group P21 (No. 4) with the following unit-cell parameters: a = 5.24041(4) Å, b =13.93113(8) Å, c = 5.26081(4) Å, and ? = 105.4347(5)°. Powder neutron diffraction of a partially deuterated sample has enabled us, for the first time, to locate the water molecule. At low temperature, the compound presents a canted antiferromagnetic state characterized by k = 0 resulting in the magnetic symmetry P21?. This symmetry is in agreement with the previously reported large magnetodielectric effect. The crystal structure of (1) can be described as being built up of triangular lattice planes made up of [Cr(II)O4Cl] square pyramids which are separated by ammonium ethyl groups along the b axis. The transition from paramagnetic to weakly ferromagnetic state results from super-superexchanges only. Surprisingly, while the overall magnetic behavior is antiferromagnetic, the Cr(II)O4Cl planes are ferromagnetic, and the strongest antiferromagnetic coupling is via the ammonium ethyl groups. Our density functional calculations confirm these aspects of the spin exchange interactions of (1) and that the spin exchange interactions between Cr(II) ions are considerably weak compared with the single-ion anisotropy of CrII. (literal)
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