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oai:recercat.cat:2445/105392025-11-21T05:52:03Zcom_2072_1057col_2072_478823col_2072_478917

Disorder-induced critical phenomena in magnetically glassy Cu-Al-Mn alloys Marcos, Jordi Vives i Santa-Eulàlia, Eduard Mañosa, Lluís Acet, Mehmet Duman, Eyüp Morin, Michel Novák, Václav Planes Vila, Antoni Histèresi Transformacions de fase (Física estadística) Aliatges Fenòmens crítics (Física) Materials magnètics Hysteresis Phase transformations (Statistical physics) Alloys Critical phenomena (Physics) Magnetic materials 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 one to determine the critical exponents ß=0.03±0.01 and ß¿=0.4±0.1, which coincide with those reported recently in a different system, thus supporting the existence of universality for disorder-induced critical points. 2009-12-28T08:55:20Z 2009-12-28T08:55:20Z 2003 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 0163-1829 https://hdl.handle.net/2445/10539 513166 eng Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.67.224406 Physical Review B, 2003, vol. 67, núm. 22, p. 224406-1-224406-5 http://dx.doi.org/10.1103/PhysRevB.67.224406 (c) The American Physical Society, 2003 info:eu-repo/semantics/openAccess 5 p. application/pdf application/pdf The American Physical Society Articles publicats en revistes (Física Quàntica i Astrofísica)