Something’s off.A report describes an ultra-thin two-layer material that produced an anomalous Hall response even when its magnetic field lay in the plane of the material. The usual picture is that this response requires a magnetic field pointing perpendicular to the film.
The researchers reportedly paired tantalum iridium telluride (TaIrTe4) with a magnetic CGT (Cr2Ge2Te6) layer. They say the interface altered the material’s symmetry and let magnetism affect the normally non-magnetic layer.
If the result holds up, a very thin magnetic sensor could potentially detect fields along more than one direction. The reported experiment was conducted under specific laboratory conditions, including cryogenic temperatures.
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