Phys. Rev. Lett. 91, 216802 (2003) [4 pages]Critical Resistance in the AlAs Quantum Hall FerromagnetSee Also: Publisher's Note Received 14 April 2003; published 20 November 2003; corrected 25 November 2003 Magnetic transitions in AlAs two-dimensional electrons give rise to sharp resistance spikes within the quantum Hall effect. Such spikes are likely caused by carrier scattering at magnetic domain walls below the Curie temperature. We report a critical behavior in the temperature dependence of the spike width and amplitude, from which we deduce the Curie temperature of the quantum Hall ferromagnet. Our data also reveal that the Curie temperature increases monotonically with carrier density. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.216802
DOI:
10.1103/PhysRevLett.91.216802
PACS:
73.43.Qt, 73.43.Nq, 73.61.Ey, 75.40.Cx
See AlsoPublisher's Note: E. P. De Poortere, E. Tutuc, and M. Shayegan, Publisher’s Note: Critical Resistance in the AlAs Quantum Hall Ferromagnet [Phys. Rev. Lett. 91, 216802 (2003)], Phys. Rev. Lett. 91, 239901 (2003). |
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