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Acta Metall Sin  1988, Vol. 24 Issue (2): 131-134    DOI:
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QUASICRYSTAL Co-Er ALLOYS
LI Hua Department of Physics;Shandong University;Jinan;JIANG Shouting;QIU Meiying;GUO Yicheng;O'Handley R. C. Department of Physics; Shandong University; Jinan Massachussetts Institute of Technology; Cambridge
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LI Hua Department of Physics;Shandong University;Jinan;JIANG Shouting;QIU Meiying;GUO Yicheng;O'Handley R. C. Department of Physics; Shandong University; Jinan Massachussetts Institute of Technology; Cambridge. QUASICRYSTAL Co-Er ALLOYS. Acta Metall Sin, 1988, 24(2): 131-134.

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Abstract  Rapidly quenched cobalt-rich alloys Co_(100-x) Er_x (14≤x≤26) weremade by melt spinning in He atmosphere. For x≈20, the Co-Er alloys show X-raydiffraction patterns in which the dominant phase can be indexed successfully withicosahedral lattice vectors. The quasicrystal Co-Er alloys are strongly magneticshowing many characteristics of sperimagnetism observed in amorphous films ofsimilar composition. The experimental results show typical magnetic properties ofthe icosahedral phase lying between those of the amorphous phase and the crystal-line phase of similar compositions. The quasicrystalline-to-crystalline transforma-tion was observed in the temperature range 385 to 630℃. The observations fuelthe assertion made by Steinhardt et al., that the icosahedral phase is a new typeof structural formula of materials.
Key words:  quasicrystal      icosahedral phase      fivefold symmetry      sperimagnetism      metastable state     
Received:  18 February 1988     
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