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β‐Ag 3 RuO 4 , a Ruthenate(V) Featuring Spin Tetramers on a Two‐Dimensional Trigonal Lattice
Author(s) -
Prasad Beluvalli E.,
Kazin Pavel,
Komarek Alexander C.,
Felser Claudia,
Jansen Martin
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201510576
Subject(s) - antiferromagnetism , diamagnetism , frustration , ion , chemistry , condensed matter physics , crystallography , trigonal crystal system , lattice (music) , chemical physics , spin (aerodynamics) , physics , crystal structure , magnetic field , thermodynamics , organic chemistry , quantum mechanics , acoustics
Open‐shell solids exhibit a plethora of intriguing physical phenomena that arise from a complex interplay of charge, spin, orbital, and spin‐state degrees of freedom. Comprehending these phenomena is an indispensable prerequisite for developing improved functional materials. This type of understanding can be achieved, on the one hand, by experimental and theoretical investigations into known systems, or by synthesizing new solids displaying unprecedented structural and/or electronic features. β‐Ag 3 RuO 4 may serve as such a model system because it possesses a remarkable anionic structure, consisting of tetrameric polyoxoanions (Ru 4 O 16 ) 12− , and is an embedded fragment of a 2D trigonal MO 2 lattice. The notorious frustration of antiferromagnetic (AF) exchange couplings on such lattices is thus lifted, and instead strong AF occurs within the oligomeric anion, where only one exchange path remains frustrated among the relevant six. The strong magnetic anisotropy of the [Ru 4 O 16 ] 12− ion, and the effectively orbital nature of its net magnetic moment, implies that this anion may reveal the properties of a single‐molecule magnet if well‐diluted in a diamagnetic matrix.