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

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Marcos J., Vives E., Manosa L., Acet M., DUMAN E., Morin M., ...Daha Fazla

PHYSICAL REVIEW B, cilt.67, sa.22, 2003 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 67 Sayı: 22
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1103/physrevb.67.224406
  • Dergi Adı: PHYSICAL REVIEW B
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Ankara Üniversitesi Adresli: Hayır

Özet

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 beta=0.03+/-0.01 and betadelta=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.