Abstract
An isostructural series of transition metal-formate-chloride-hydrate compounds, M3(OOCH)5Cl(OH2) (M = Fe, Co, Ni), have been synthesized using a solvothermal method. These compounds crystallize in the chiral and polar space group P31 and are comprised of three different types of helical chains of edge-sharing M2+-centered octahedra. All three compounds undergo 3D ferrimagnetic ordering at low temperature, and the iron and cobalt analogues exhibit field-induced metamagnetic transitions. The magnetic structure was determined by neutron powder diffraction, revealing ferromagnetic intrachain coupling and antiferromagnetic interchain interactions, with the three chains arranged in a two-up/one-down triangular lattice. As all three chains contain one type of metal in the same spin state, these compounds are rare examples of homospin topological ferrimagnets.
Original language | English |
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Pages (from-to) | 7716-7724 |
Number of pages | 9 |
Journal | Chemistry of Materials |
Volume | 29 |
Issue number | 18 |
DOIs | |
State | Published - Sep 26 2017 |
Funding
We thank X. B. Powers for collecting the single-crystal dataset for the nickel compound at the Advanced Light Source, P. Klavins for help with the magnetic measurements, and F. Osterloh for access to the solid-state UV−vis spectrophotometer. The University of California, Davis and UC Davis ChemEnergy NSF REU Grant #CHE-1004925 are gratefully acknowledged for financial support. J.T.G. acknowledges the ARCS fellowship. We thank the National Science Foundation MRI program, Grant 1531193, for the funding for the Bruker D8 Venture single crystal X-ray diffractometer. The work at the Oak Ridge National Laboratory was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences (OBES), U.S. Department of Energy (DOE). The work at the Advanced Light Source was supported by the Director, Office of Science, OBES, U.S. DOE under Contract No. DE-AC02-05CH11231.