Dissipationless Anomalous Hall Current in the Ferromagnetic Spinel CuCr2Se4-xBrx

Wei Li Lee, Satoshi Watauchi, V. L. Miller, R. J. Cava, N. P. Ong

Research output: Contribution to journalArticle

170 Scopus citations

Abstract

In a ferromagnet, an applied electric field E invariably produces an anomalous Hall current JH that flows perpendicular to the plane defined by E and M (the magnetization). For decades, the question of whether JH is dissipationless (independent of the scattering rate) has been debated without experimental resolution. In the ferromagnetic spinel CuCr 2Se4-xBrx′, the resistivity ρ (at low temperature) may be increased by several decades by varying x (Br) without degrading M. We show that JH/E (normalized per carrier, at 5 kelvin) remains unchanged throughout. In addition to confirming the dissipationless nature of JH, our finding has implications for the generation and study of spin-Hall currents in bulk samples.

Original languageEnglish (US)
Pages (from-to)1647-1649
Number of pages3
JournalScience
Volume303
Issue number5664
DOIs
StatePublished - Mar 12 2004

All Science Journal Classification (ASJC) codes

  • General

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