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| Home > Publications database > Two spin-canting textures in the antiferromagnetic phase AF1 of MnWO 4 based on the new polar atomistic model in P 2 |
| Journal Article | FZJ-2018-02076 |
; ; ; ;
2018
IOP Publ.
Bristol
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Please use a persistent id in citations: doi:10.1088/1361-648X/aaaeae
Abstract: The low temperature antiferromagnetic (AF) phase of MnWO4 (the so-called AF1phase) exhibits different spin-canting configurations at two Mn2+ sublattices of the(3 + 1)-dimensional magnetic structure. The suggested superspace group P2.1(, 1/2, )0sis a significant consequence of the polar space group P2 true for the nuclear structure ofMnWO4. Density functional theory calculations showed that its ground state prefers this twospin-canting system. The structural difference between two independent atomic sites for Mn(Mna, Mnb) is too small to allow microscopically detectable electric polarisation. However,this hidden intrinsic polar character allows AF1 two commensurately modulated spin-cantingtextures. This is considered as the prerequisite onset of the improper ferroelectricity enhancedby the helical spin order in the multiferroic phase AF2 of MnWO4.
Keyword(s): Magnetic Materials (1st) ; Magnetism (2nd)
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