Resistance spikes at transitions between quantum hall ferromagnets

E. P. De Poortere, E. Tutuc, S. J. Papadakis, M. Shayegan

Research output: Contribution to journalArticle

140 Scopus citations

Abstract

We report a manifestation of first-order magnetic transitions in two-dimensional electron systems. This phenomenon occurs in aluminum arsenide quantum wells with sufficiently low carrier densities and appears as a set of hysteretic spikes in the resistance of a sample placed in crossed parallel and perpendicular magnetic fields, each spike occurring at the transition between states with different partial magnetizations. Our experiments thus indicate that the presence of magnetic domains at the transition starkly increases dissipation, an effect also suspected in other ferromagnetic materials. Analysis of the positions of the transition spikes allows us to deduce the change in exchange-correlation energy across the magnetic transition, which in turn will help improve our understanding of metallic ferromagnetism.

Original languageEnglish (US)
Pages (from-to)1546-1549
Number of pages4
JournalScience
Volume290
Issue number5496
DOIs
StatePublished - Nov 24 2000

All Science Journal Classification (ASJC) codes

  • General

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