Abstract
A study of magnetic avalanches in Perminvar, an Fe-Ni-Co alloy, shows that some avalanches are almost exactly reproducible from one magnetic field cycle to the next, while others show significant variability. Averaging over many cycles produces a fingerprint reflecting the reproducibility of the noise. The fingerprint is not strongly temperature or driving-rate dependent, indicating that the variability is a consequence of dynamical effects. We also find that the slope of the cycle-averaged magnetization, , is correlated with the cycle-to-cycle variations in magnetization, .
- Received 16 August 1995
DOI:https://doi.org/10.1103/PhysRevLett.75.4694
©1995 American Physical Society