Scatena, R; Johnson, RD; Manuel, P; Macchi, P; (2020) Formate-mediated magnetic superexchange in the model hybrid perovskite [(CH₃)₂NH₂]Cu(HCOO)₃. Journal of Materials Chemistry C , 8 (37) pp. 12840-12847. 10.1039/d0tc03913f.

Preview

Text d0tc03913f.pdf - Published Version Download (2MB) | Preview

Abstract

We have investigated the magnetic and electronic structures of crystalline dimethylammonium copper formate [(CH3)2NH2]Cu(HCOO)3, a model compound that belongs to a wide class of hybrid organic–inorganic perovskites. We present the results of a combined experimental approach, where neutron diffraction and magnetisation measurements were used to solve the ground state magnetic structure in which the same ligand mediates both antiferromagnetic and ferromagnetic interactions, while the electron charge density distribution and orbital occupancy were determined by high-resolution X-ray diffraction. The latter enabled a microscopic analysis of the chemical bonding, from which we established a detailed correlation between the structural, electronic, and magnetic properties of [(CH3)2NH2]Cu(HCOO)3, demonstrating the primary role of Cu–O bonding in establishing the nature of the exchange. Our results elucidate the mechanism of magnetic exchange mediated by formate anions, from which we examine the applicability of foundational theories of purely inorganic perovskites and define characteristics that the ligands should meet to support the use of the Goodenough–Kanamori–Anderson rules.

Download activity - last month

Export as JSONCSVXML

Download activity - last 12 months

Export as XMLCSVJSON

Downloads by country - last 12 months

Export as JSONXMLCSV

Archive Staff Only

View Item