Magnetic structure and properties of the honeycomb antiferromagnet [Na(OH 2 ) 3 ]Mn(NCS) 3

We report the magnetic structure and properties of a thiocyanate-based honeycomb magnet [Na(OH ) ]Mn(NCS) which crystallises in the unusual low-symmetry trigonal space group 3̄. Magnetic measurements on powder samples show this material is an antiferromagnet (ordering temperature = 18.1(6) K) and ca...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2024, Vol.26 (22), p.15844-15849
Main Authors: Geers, Madeleine, Gill, Thomas B, Burnett, Andrew D, Bassey, Euan N, Fabelo, Oscar, Cañadillas-Delgado, Laura, Cliffe, Matthew J
Format: Article
Language:English
Subjects:
Antiferromagnetism
Diffraction
Low temperature
Magnetic measurement
Magnetic properties
Magnetic structure
Second harmonic generation
Single crystals
Symmetry
Thiocyanates
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Summary:We report the magnetic structure and properties of a thiocyanate-based honeycomb magnet [Na(OH ) ]Mn(NCS) which crystallises in the unusual low-symmetry trigonal space group 3̄. Magnetic measurements on powder samples show this material is an antiferromagnet (ordering temperature = 18.1(6) K) and can be described by nearest neighbour antiferromagnetic interactions = -11.07(4) K. A method for growing neutron-diffraction sized single crystals (>10 mm ) is demonstrated. Low temperature neutron single crystal diffraction shows that the compound adopts the collinear antiferromagnetic structure with = 18.94(7) K, magnetic space group 3̄'. Low temperature second-harmonic generation (SHG) measurements provide no evidence of breaking of the centre of symmetry.
ISSN:1463-9076
1463-9084
DOI:10.1039/d4cp01265h