Criticality in Cu-Al-Mn hysteresis loops

Marcos J., Vives E., Manosa L., Planes A., Duman E., Acet M.

Journal of Magnetism and Magnetic Materials, cilt.272-276, sa.SUPPL. 1, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Özet
  • Cilt numarası: 272-276 Sayı: SUPPL. 1
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1016/j.jmmm.2003.11.293
  • Dergi Adı: Journal of Magnetism and Magnetic Materials
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Cu-Al-Mn, magnetic hysteresis, disorder-induced phase transition, scaling, critical exponent
  • Ankara Üniversitesi Adresli: Hayır

Özet

Measurements of magnetic hysteresis loops performed at low temperatures on Cu-Al-Mn alloys with different Mn-content are presented. The loops are smooth and continuous above a certain temperature, while they exhibit a magnetization discontinuity below this temperature. Scaling analysis suggests that this system displays a disorder-induced phase transition line and allows determining the critical exponents (β = 0.03±0.01 and ßδ = 13±3). Results indicate that by changing temperature, it is possible to tune the disorder responsible for the transition. © 2003 Elsevier B.V. All rights reserved.