Magnetic Properties of the Distorted Kagomé Lattice Mn3(1,2,4-(O2C)3C6H3)2.
Identifieur interne : 000855 ( Main/Exploration ); précédent : 000854; suivant : 000856Magnetic Properties of the Distorted Kagomé Lattice Mn3(1,2,4-(O2C)3C6H3)2.
Auteurs : Richard A. Mole [Australie] ; Stephen Greene [Royaume-Uni] ; Paul F. Henry [France] ; Simon M. Humphrey [Royaume-Uni] ; Kirrily C. Rule [Australie] ; Tobias Unruh [Allemagne] ; Gerald F. Weldon [Royaume-Uni] ; Dehong Yu [Australie] ; John A. Stride [Australie] ; Paul T. Wood [Royaume-Uni]Source :
- Inorganic chemistry [ 1520-510X ] ; 2017.
Abstract
Kagomé lattice types have been of intense interest as idealized examples of extended frustrated spin systems. Here we demonstrate how the use of neutron diffraction and inelastic neutron scattering coupled with spin wave theory calculations can be used to elucidate the complex magnetic interactions of extended spin networks. We show that the magnetic properties of the coordination polymer Mn3(1,2,4-(O2C)3C6H3)2, a highly distorted kagomé lattice, have been erroneously characterized as a canted antiferromagnet in previous works. Our results demonstrate that, although the magnetic structure is ferrimagnetic, with a net magnetic moment, frustration persists in the system. We conclude by showing that the conventions of the Goodenough-Kanamori rules, which are often applied to similar magnetic exchange interactions, are not relevant in this case.
DOI: 10.1021/acs.inorgchem.7b00597
PubMed: 28641000
Affiliations:
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<front><div type="abstract" xml:lang="en">Kagomé lattice types have been of intense interest as idealized examples of extended frustrated spin systems. Here we demonstrate how the use of neutron diffraction and inelastic neutron scattering coupled with spin wave theory calculations can be used to elucidate the complex magnetic interactions of extended spin networks. We show that the magnetic properties of the coordination polymer Mn3(1,2,4-(O2C)3C6H3)2, a highly distorted kagomé lattice, have been erroneously characterized as a canted antiferromagnet in previous works. Our results demonstrate that, although the magnetic structure is ferrimagnetic, with a net magnetic moment, frustration persists in the system. We conclude by showing that the conventions of the Goodenough-Kanamori rules, which are often applied to similar magnetic exchange interactions, are not relevant in this case.</div>
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