Ginga VA, Siidra OI, Breitner F, Jesche A, Tsirlin AA. Chemical Vapor Transport Synthesis of Cu(VO)
2(AsO
4)
2 With Two Distinct Spin-1/2 Magnetic Ions.
Inorg Chem 2022;
61:16539-16548. [PMID:
36226856 DOI:
10.1021/acs.inorgchem.2c00293]
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Abstract
A new copper vanadyl arsenate, Cu(VO)2(AsO4)2, was synthesized via the chemical vapor transport method. Cu(VO)2(AsO4)2 adopts an original structure type. It is characterized by layers formed by edge-sharing and corner-sharing V-centered octahedra resulting in a unique topology that was hitherto not reported for vanadates. Single CuO6 octahedra connect vanadate layers into a rigid framework. The thermal expansion of the framework studied by the single-crystal HT X-ray diffraction is reported. The magnetic behavior of Cu(VO)2(AsO4)2 shows an interplay of ferromagnetic V4+-V4+ and antiferromagnetic Cu2+-V4+ interactions that result in a ferrimagnetic long-range order below TC = 66 K.
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