Disorder induced critical phenomena in magnetically glassy Cu-Al-Mn alloys

Abstract

Measurements of magnetic hysteresis loops in Cu-Al-Mn alloys of different Mn content at low temperatures are presented. The loops are smooth and continuous above a certain temperature, but exhibit a magnetization discontinuity below that temperature. Scaling analysis suggest that this system displays a disorder induced phase transition line. Measurements allow to determine the critical exponents $\beta =0.03\pm 0.01$ and $\beta \delta =0.4\pm 0.1$ in agreement with those reported recently [Berger et al., Phys. Rev. Lett. {\bf 85}, 4176 (2000)]

4 pages, 5 figures

References in corpus (1)

• Hysteresis and Avalanches in the Random Anisotropy Ising Model

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