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Magnetoconductance noise and irreversibilities in submicron wires of spin-glass n-CdMnTe

J. Jaroszynski, J. Wrobel, G. Karczewski, T. Wojtowicz, T. Dietl

cond-mat.mes-hallarXiv:cond-mat/9804313

Abstract

Signatures of spin-glass freezing such as the appearance of 1/f conductance noise, the recovery of universal conductance fluctuations, aging, as well as magnetic and thermal irreversibilities are detected in mesoscopic wires of CdMnTe:I at millikelvin temperatures. Spectral characteristics of conductance time series are consistent with the droplet model of short-range spin-glasses.

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