000845494 001__ 845494 000845494 005__ 20250129094154.0 000845494 0247_ $$2doi$$a10.1103/PhysRevB.97.144402 000845494 0247_ $$2ISSN$$a0163-1829 000845494 0247_ $$2ISSN$$a0556-2805 000845494 0247_ $$2ISSN$$a1094-1622 000845494 0247_ $$2ISSN$$a1095-3795 000845494 0247_ $$2ISSN$$a1098-0121 000845494 0247_ $$2ISSN$$a1550-235X 000845494 0247_ $$2ISSN$$a2469-9950 000845494 0247_ $$2ISSN$$a2469-9969 000845494 0247_ $$2Handle$$a2128/18385 000845494 0247_ $$2WOS$$aWOS:000429208800006 000845494 0247_ $$2altmetric$$aaltmetric:31744644 000845494 037__ $$aFZJ-2018-02728 000845494 082__ $$a530 000845494 1001_ $$0P:(DE-Juel1)142282$$aReim, Johannes$$b0$$eCorresponding author 000845494 245__ $$aNeutron diffraction study and theoretical analysis of the antiferromagnetic order and the diffuse scattering in the layered kagome system CaBaCo$_2$Fe$_2$O$_7$ 000845494 260__ $$aWoodbury, NY$$bInst.$$c2018 000845494 3367_ $$2DRIVER$$aarticle 000845494 3367_ $$2DataCite$$aOutput Types/Journal article 000845494 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1553262597_16453 000845494 3367_ $$2BibTeX$$aARTICLE 000845494 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000845494 3367_ $$00$$2EndNote$$aJournal Article 000845494 520__ $$aThe hexagonal swedenborgite, CaBaCo2Fe2O7, is a chiral frustrated antiferromagnet, in which magnetic ions form alternating kagome and triangular layers. We observe a long-range √3×√3 antiferromagnetic order setting in below TN=160 K by neutron diffraction on single crystals of CaBaCo2Fe2O7. Both magnetization and polarized neutron single crystal diffraction measurements show that close to TN spins lie predominantly in the ab plane, while upon cooling the spin structure becomes increasingly canted due to Dzyaloshinskii-Moriya interactions. The ordered structure can be described and refined within the magnetic space group P31m′. Diffuse scattering between the magnetic peaks reveals that the spin order is partial. Monte Carlo simulations based on a Heisenberg model with two nearest-neighbor exchange interactions show a similar diffuse scattering and coexistence of the √3×√3 order with disorder. The coexistence can be explained by the freedom to vary spins without affecting the long-range order, which gives rise to ground-state degeneracy. 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