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We present an experimental study of the changes generated on the electricalresistance $R(T)$ of epitaxial Cr thin films by the transformation of quantizedspin density wave domains as the temperature is changed. A characteristicresistance noise appears only within the same temperature region where acooling-warming cycle in $R(T)$ displays hysteretic behavior. We propose ananalysis based on an analogy with the Barkhausen noise seen in ferromagnets.There fluctuations in the magnetization $M(H)$ occur when the magnetic field$H$ is swept. By mapping $M \rightarrow \Psi_0$ and $H \rightarrow T$, where$\Psi_0$ corresponds to the order parameter of the spin density wave, wegeneralize the Preisach model in terms of a random distribution of {\itresistive hysterons} to explain our results. These hysterons are related todistributions of quantized spin density wave domains with different sizes,local energies and number of nodes.

Barkhausen-type noise in the resistance of antiferromagnetic Cr thin films