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Title: Molecular analogue of the perovskite repeating unit and evidence for direct MnIII-CeIV-MnIII exchange coupling pathway

Journal Article · · Nature Communications
 [1];  [2];  [2];  [1];  [2];  [2];  [1]
  1. Univ. of Florida, Gainesville, FL (United States). Dept. of Chemistry
  2. Univ. of Florida, Gainesville, FL (United States). Dept. of Physics

Here, the perovskite manganites AMnO3 and their doped analogues A1–x B x MnO3 (A and B = main group and lanthanide metals) are a fascinating family of magnetic oxides exhibiting a rich variety of properties. They are thus under intense investigation along multiple fronts, one of which is how their structural and physical properties are modified at the nanoscale. Here we show that the molecular compound [Ce3Mn8O8(O2CPh)18(HO2CPh)2] (CeIII 2CeIVMnIII 8; hereafter Ce3Mn8) bears a striking structural resemblance to the repeating unit seen in the perovskite manganites. Further, magnetic studies have established that Ce3Mn8 exhibits both the combination of pairwise MnIII 2 ferromagnetic and antiferromagnetic exchange interactions, and the resultant spin vector alignments that are found within the 3-D C-type antiferromagnetic perovskites. First-principles theoretical calculations reveal not only the expected nearest-neighbor MnIII 2 exchange couplings via superexchange pathways through bridging ligands but also an unusual, direct MnIII–CeIV–MnIII metal-to-metal channel involving the CeIV f orbitals.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center
Sponsoring Organization:
USDOE
OSTI ID:
1489401
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 8; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Nonequilibrium magnetic properties in oxygen-rich LaMnO 3 nanoparticles journal June 2019
Isolation of heterometallic cerium( iii ) complexes with a multidentate nitrogen–phosphorus ligand journal January 2020