Abstract

TbMn 2Si 2 (ThCr 2Si 2-type crystal structure) exhibits at 1.6 K two ferromagnetic sublattices composed of Tb 1− and Mn 2− magnetic moments directed along the c-axis; their magnitudes at 1.6 K are 8.7(1) and2.4(1)μ R respectively. The sublattices are oriented antiferromagnetically. The Tb sublattice becomes disordered at 100 K: the Mn sublattice starts to transform into an antiferromagnetic structure at 100 K and is stable with2.4(1)μ R moment up to the Néel point at 501 K.

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