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Title: Long-range antiferromagnetic order in malonate-based compounds Na2M(H2C3O4)2·2H2O (M = Mn, Fe, Co, Ni)

Journal Article · · Dalton Transactions
DOI:https://doi.org/10.1039/c5dt04527d· OSTI ID:1324790
 [1];  [2];  [2];  [3]
  1. Collège de France, Paris (France); Réseau sur le Stockage Electrochimique de l'Energie (RS2E) (France); Sorbonne Univ., Paris (France)
  2. Sorbonne Univ., Paris (France)
  3. Centre National de la Recherche Scientifique (CNRS), Amiens (France)

In this work, the recently discovered metal-malonate compounds of formulae Na2M(H2C3O4)2·2H2O with M = Mn, Fe, Co, Ni are investigated for their magnetic properties. While the Cu-based material is a weak ferromagnet, all other members present antiferromagnetic interactions. Neutron powder diffraction experiments reveal the establishment of a long range magnetic order at low temperature in the Pbca Shubnikov magnetic group. The magnetic structures are characterized by antiferromagnetic layers perpendicular to [001]. These layers are stacked antiparallel (M = Fe) or parallel (M = Mn, Ni) in the (a, c) plane. Magnetic moments are collinear to b for the former and to c for the latter. The M = Co malonate exhibits a non-collinear magnetic structure intermediate between the two latter, with components along b and c. Density functional theory calculations indicate that the dominant magnetic interaction, J1, occurs along a malonate group via a carboxylate and links two transition metals within the same layer, while other interactions (inter- or intra-layer) are much weaker, so that these compounds present the dominant characteristics of 2D-antiferromagnets.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE; Grand Equipement National de Calcul Intensif
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1324790
Journal Information:
Dalton Transactions, Vol. 45, Issue 6; ISSN 1477-9226
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

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