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

Jordi Marcos·Eduard Vives·Lluis Manosa·Mehmet Acet·Eyup Duman·Michel Morin·Vaclav Novak·Antoni Planes
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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 $β=0.03\pm 0.01$ and $βδ= 0.4 \pm 0.1$ in agreement with those reported recently [Berger et al., Phys. Rev. Lett. {\bf 85}, 4176 (2000)]

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Jordi Marcos, Eduard Vives, Lluis Manosa, Mehmet Acet, Eyup Duman, Michel Morin, Vaclav Novak, Antoni Planes. 2002-09-13. Disorder induced critical phenomena in magnetically glassy Cu-Al-Mn alloys. https://doi.org/10.1103/physrevb.67.224406

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