Critical Resistance of the Quantum Hall Ferromagnet in AlAs 2D Electrons

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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.
Added a figure & minor corrections to text; to appear in Phys. Rev. Lett

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Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/21275

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0304507
 http://arxiv.org/abs/cond-mat/0304507

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arXiv