We study the current scaling of the oscillatory magnetoresistance peak height in microwave induced magnetoresistance oscillations, over the temperature range \(0.35 \le T \le 1.25\,\,{\rm K}\) , by examining the change in response observed under a supplementary \(I_{DC}\) current bias, when the \(I_{DC}\) also produces an overall giant negative magnetoresistance in the high mobility GaAs/AlGaAs system. A “universality” is observed in the decay of the magnetoresistance peak height over the examined temperatures, sizes, and applied \(I_{DC}\) . The results suggest that the photoexcited resistance maxima are sensitive not to the DC current, but rather to the current density \(j_{DC}= I_{DC}/W.\)
