Antiferromagnetism in semiconducting KFe0.85Ag1.15Te2 single crystals
Hechang Lei, Emil S. Bozin, Kefeng Wang, and C. Petrovic
TL;DR
This study reports the synthesis of a new semiconducting KFeAgTe2 crystal exhibiting antiferromagnetism at 35 K, contrasting prior theoretical predictions of higher Tc in related compounds.
Contribution
First synthesis and characterization of semiconducting KFeAgTe2 with antiferromagnetic order, expanding understanding of magnetic properties in related iron chalcogenides.
Findings
KFeAgTe2 is a semiconductor.
It exhibits antiferromagnetic transition at 35 K.
Crystallizes in ThCr2Si2 structure without deficiencies.
Abstract
We have synthesized single crystals of K1.00(3)Fe0.85(2)Ag1.15(2)Te2.0(1). The materials crystallizes in the ThCr2Si2 structure with I4/mmm symmetry and without K and Fe/Ag deficiencies, unlike in KxFe2-ySe2 and KxFe2-yS2. In contrast to theoretical prediction for higher Tc in KFe2Te2, KFe0.85Ag1.15Te2 is a semiconductor with long-range antiferromagnetic transition at TN = 35 K.
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