Magnetic structure and properties of the honeycomb antiferromagnet [Na(OH2)3]Mn(NCS)3.
Phys Chem Chem Phys
; 26(22): 15844-15849, 2024 Jun 06.
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| ID: mdl-38779829
ABSTRACT
We report the magnetic structure and properties of a thiocyanate-based honeycomb magnet [Na(OH2)3]Mn(NCS)3 which crystallises in the unusual low-symmetry trigonal space group P3Ì. Magnetic measurements on powder samples show this material is an antiferromagnet (ordering temperature TN,mag = 18.1(6) K) and can be described by nearest neighbour antiferromagnetic interactions J = -11.07(4) K. A method for growing neutron-diffraction sized single crystals (>10 mm3) is demonstrated. Low temperature neutron single crystal diffraction shows that the compound adopts the collinear antiferromagnetic structure with TN,neut = 18.94(7) K, magnetic space group P3Ì'. Low temperature second-harmonic generation (SHG) measurements provide no evidence of breaking of the centre of symmetry.
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