Crossover behavior of the anomalous Hall effect and anomalous nernst effect in itinerant ferromagnets

• Published in: Physical review letters Vol. 99; no. 8; p. 086602
• Main Authors: Miyasato, T, Abe, N, Fujii, T, Asamitsu, A, Onoda, S, Onose, Y, Nagaosa, N, Tokura, Y
• Format: Journal Article
• Language: English
• Published: United States 24.08.2007
• Subjects: Magnets
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/physrevlett.99.086602

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.