Crystal structure and properties of the manganese containing Swedenborgite YBaMn3AlO7

Small single crystals of the new Swedenborgite YBaMn3AlO7 were synthesized in a floating-zone image furnace. The crystal structure is well described using the hexagonal symmetry P63mc (a = 6.37081(4), c = 10.3873(1) Å) and contains a geometrically frustrated metal sublattice of (Mn3Al) including kagome layers and trigonal interlayer sites. Thermodynamic and magnetic measurements indicate that YBaMn3AlO7 undergoes a magnetic freezing close to 16 K, below which a spin-glass like state is observed. The glassy state is a result of geometric frustration and Mn–Al disorder.

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