Low-temperature magnetic properties of Al-Pd-Mn-B quasicrystalline alloys

Dong Liang Peng, Kenji Sumiyama, Kenji Suzuki, Akihisa Inoue, Yoshihiko Yokoyama, Kenzo Fukaura, Hisakichi Sunada

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Low-temperature magnetic properties of the Al70-xPd15Mn15Bx icosahedral alloys (0 ≤ x ≤ 6) were measured by a superconducting quantum interference device (SQUID). The alloy with x = 0 is a simple spin glass: the thermoremanent magnetization, MR(t), is characterized by a stretched exponential: MR(t) = M1 + M0 exp[ - (t/τ)β]. The alloy with x = 1 is a cluster glass: MR(t) is also in the stretched exponential form, while the alloy with x = 1.5 is superparamagnetic. In alloys with x = 1 and 1.5, there is a very small amount of a ferromagnetic component. The alloys with 2.5 ≤ x ≤ 6 are composed of a ferromagnetic component and a superparamagnetic and/or Curie-Weiss paramagnetic one. Therefore, the addition of B significantly changes the magnetic state of the Al-Pd-Mn alloys, owing to the formation and growth of magnetic Mn clusters.

Original languageEnglish
Pages (from-to)319-329
Number of pages11
JournalJournal of Magnetism and Magnetic Materials
Volume184
Issue number3
DOIs
Publication statusPublished - 1998 May 5

Keywords

  • Cluster glass
  • Ferromagnetism
  • Icosahedral alloy
  • Spin glass
  • Superparamagnetism

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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