Phase transition and magnetic properties of supercooled Al-Ge-TM (TM=Cr, Fe, Co) alloys

Yoshihiko Yokoyama, Yoshihiro Yamada, Atsushi Yamaguchi, Kenichi Matono, Kenzo Fukaura, Hisakichi Sunada

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Formation criteria and magnetic properties of rapidly solidified Al-Ge-TM (TM=Cr, Fe and Co) alloys were examined. The phase changes from amorphous, icosahedral, and decagonal, to approximant crystalline, corresponding to TM as Cr (Ge rich), Cr, Fe and Co, respectively, in the rapidly solidified Al-Ge-TM alloys. Thermomagnetic curves indicate that for the systematically variation of the magnetic ordered phases, Al40Ge40Cr20 amorphous, Al60Ge20Cr20 icosahedral, Al50Ge20Fe30 decagonal and Al60Ge10Co30 approximant crystalline alloys were identified to be of ferromagnetism, mictomagnetism, Curie-Weiss paramagnetism and Pauli paramagnetism, respectively.

Original languageEnglish
Pages (from-to)433-438
Number of pages6
JournalMaterials Transactions, JIM
Volume39
Issue number4
DOIs
Publication statusPublished - 1998 Apr

Keywords

  • Aluminum-germanium-transition metal alloy system
  • Amorphous
  • Curie-weiss paramagnetism
  • Ferromagnetism
  • Icosahedral or decagonal quasicrystal
  • Spinglass

ASJC Scopus subject areas

  • Engineering(all)

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