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

doi:10.2320/matertrans1989.39.433

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

Institute for Materials Research (IMR)

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	433-438
Number of pages	6
Journal	Materials Transactions, JIM
Volume	39
Issue number	4
DOIs	https://doi.org/10.2320/matertrans1989.39.433
Publication status	Published - 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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title = "Phase transition and magnetic properties of supercooled Al-Ge-TM (TM=Cr, Fe, Co) alloys",

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.",

keywords = "Aluminum-germanium-transition metal alloy system, Amorphous, Curie-weiss paramagnetism, Ferromagnetism, Icosahedral or decagonal quasicrystal, Spinglass",

author = "Yoshihiko Yokoyama and Yoshihiro Yamada and Atsushi Yamaguchi and Kenichi Matono and Kenzo Fukaura and Hisakichi Sunada",

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AU - Yokoyama, Yoshihiko

AU - Yamada, Yoshihiro

AU - Yamaguchi, Atsushi

AU - Matono, Kenichi

AU - Fukaura, Kenzo

AU - Sunada, Hisakichi

PY - 1998/4

Y1 - 1998/4

N2 - 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.

AB - 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.

KW - Aluminum-germanium-transition metal alloy system

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KW - Icosahedral or decagonal quasicrystal

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