Coexistence of ferromagnetism and unconventional spin-glass freezing in the site-disordered kagome ferrite SrSn2Fe4O11

Single-crystal x-ray diffraction refinements indicate SrSn2Fe4O11 crystallizes in the hexagonal R-type ferrite structure with noncentrosymmetric space group P63mc and lattice parameters a=5.9541(2)Å, c=13.5761(5)Å, Z=2 (R(F)=0.034). Octahedrally coordinated 2a [M(1) and M(1a)] and 6c sites [M(2)] ha...

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