Berry's phase contribution to the anomalous Hall effect of gadolinium

Details Berry's phase contribution to the anomalous Hall effect of gadolinium Berry's phase contribution to the anomalous Hall effect of gadolinium

2004-04-21

arxiv.org/abs/cond-mat/0404485v1

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 7 figures, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.71.104407

When conduction electrons are forced to follow the local spin texture, the resulting Berry phase can induce an anomalous Hall effect (AHE). In gadolinium, as in double-exchange magnets, the exchange interaction is mediated by the conduction electrons and the AHE may therefore resemble that of chromium dioxide and other metallic double-exchange ferromagnets. The Hall resistivity, magnetoresistance, and magnetization of single crystal gadolinium were measured in fields up to 30 T. Measurements between 2 K and 400 K are consistent with previously reported data. A scaling analysis for the Hall resistivity as a function of the magnetization suggests the presence of a Berry's-phase contribution to the anomalous Hall effect.

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