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Paper detail

The anti-ordinary Hall effect in NiPt thin films

We study the anomalous Hall effect in binary alloys between the group-10 elements Ni and Pt. It is observed that the ordinary Hall effect is negative (electron-like) at any composition of the alloy. The extraordinary Hall effect is also negative except in the vicinity of the ferromagnetic quantum critical point. Close to the critical point the sign of the extraordinary Hall effect can be changed to positive (hole-like) by tuning either the temperature or the composition of the alloy. We attribute such an "anti-ordinary" Hall effect with opposite signs of the ordinary and the extraordinary contributions to a Berry phase singularity, moving away from the Fermi energy with increasing the ferromagnetic exchange energy.

preprint2012arXivOpen access
Taras GolodAndreas RydhPeter SvedlindhVladimir M. Krasnov
cond-mat.mtrl-sci
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Taras GolodAndreas RydhPeter SvedlindhVladimir M. Krasnov

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