Magnetoresistance of Hexagonal FeGe Single Crystals between 4.2 K and 30 K

Abstract
The low field transverse magnetoresistance of hexagonal FeGe has been measured for the field in the basal plane with current both parallel and perpendicular to the c-axis. At a temperature dependent critical field (Δ/0) // c shows a sharp peak, then decreases rapidly until it levels off at a second critical field. (Δ/0) ⊥ c exhibits a sharp dip at the first critical field followed by rising magnetoresistance with increasing field until the second critical field, where it levels off. The observed anomalies are related to changes in the spin structure and magnetic superzone effects. The possibilities of itinerant antiferromagnetism are also considered.

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