Al-Ge-Mn and Al-Cu-Ge-Mn quasi-crystals with coercivity at room temperature

An Pang Tsai, Akihisa Inoue, Tsuyoshi Masumoto, Noriyuki Kataoka

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    80 Citations (Scopus)


    Icosahedral quasi-crystals with coercivity at room temperature are found in rapidly solidified Al-Ge-Mn and Al-Cu-Ge-Mn alloys with compositions ranging form 20 to 25 at%Ge, 22.5 to25%Mn and 0 to 10%Cu. The highest Curie temperature is 533 K for Al52.5Ge22.5Mu25and 467 K for Al40Cu10Ge25Mn25The magnetization (σ20) of the Al-Ge-Mn alloys in a field of 20 kOe at roomtemperature increases from 0.2 to 0.5 emu/g with increasing Ge and Mn contents and the coercivity(Hc) is in the range of 0.7 to 1.1 kOe. The replacement of Al by 10%Cu is found to bring about significant increases of σ20and Hcto 3.9 emu/g and 1.8 kOe.

    Original languageEnglish
    Pages (from-to)L2252-L2255
    JournalJapanese journal of applied physics
    Issue number12A
    Publication statusPublished - 1988 Dec


    • Al-Cu-Ge-Mn
    • Al-Ge-Mn
    • Coercivity
    • Curie temperature
    • Icosahedral quasi-crystal
    • Magnetism
    • Magnetization
    • Rapid solidification

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)


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