2004/07/31 by Wei-Li Lee, S. Watauchi, V. L. Miller +2 · 1 citation
Physics and Astronomy · #cond-mat.other
paper · pdf · doi:10.1103/physrevlett.93.226601
published as Phys. Rev. Lett. 93, 226601 (2004) · 4 pages, 5 figures, revision with publication info
arxiv created 2004/12/10 · arxiv updated 2009/12/01
In a ferromagnet, an anomalous-Hall heat current, given by the off-diagonal Peltier term αxy, accompanies the anomalous Hall current. By combining Nernst, thermopower and Hall experiments, we have measured how αxy varies with hole density and lifetime τ in \rm CuCr2Se4-xBrx. At low temperatures T, we find that αxy is independent of τ, consistent with anomalous-velocity theories. Its magnitude is fixed by a microscopic geometric area \cal A∼ 34 \mathrmÅ2. Our results are incompatible with some models of the Nernst effect in ferromagnets.