Crossover behavior of the anomalous Hall effect and anomalous nernst effect in itinerant ferromagnets.
The anomalous Hall effect (AHE) and anomalous Nernst effect (ANE) are experimentally investigated in a variety of ferromagnetic metals including pure transition metals, oxides, and chalcogenides, whose resistivities range over 5 orders of magnitude. For these ferromagnets, the transverse conductivity sigma{xy} versus the longitudinal conductivity sigma{xx} shows a crossover behavior with three distinct regimes in accordance qualitatively with a recent unified theory of the intrinsic and extrinsic AHE. We also found that the transverse Peltier coefficient alpha{xy} for the ANE obeys the Mott rule. These results offer a coherent and semiquantitative understanding of the AHE and ANE to an issue of controversy for many decades.
Miyasato
T
T
Cryogenic Research Center, University of Tokyo, Tokyo, Japan.
Abe
N
N
Fujii
T
T
Asamitsu
A
A
Onoda
S
S
Onose
Y
Y
Nagaosa
N
N
Tokura
Y
Y
D059346:Magnets