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Possible topological contribution to the anomalous Hall effect of non-collinear ferromagnet Fe3Sn2

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https://journals.aps.org/prb/abstract/10.1103/PhysRevB.100.174420
Original languageEnglish
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume100
Issue number17
DOIs
Publication statusPublished - 18 Nov 2019

Abstract

The magnetisation, magnetoresistance and Hall eect of the kagome structured material Fe3Sn2 is reported for high quality single crystals. Previous investigations of Fe3Sn2 polycrystals detected ferromagnetism at Tc 657 K with moments along the easy c-axis and a moment rotation towards the a-b plane on cooling that culminates in moments freezing to form a spin glass at TF 80 K.
The results presented here for single crystals show a lower value of TF = 70 2:5 K most likely due to the increased sample quality. Above TF we identify a topological contribution to the Hall resistivity coinciding with an anomalous magnetoresistance. This supports recent proposals that the magnetic structure contains magnetic Skyrmions in this temperature range.

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