Abstract
New metallic glass alloys have been prepared by melt spinning of La−Si samples in a pumped system. The superconducting transition temperature,T c , increases linearly with the La concentration, from 3.00 K at 73 at. % La to 3.80 K at 85 at. %. Three new metastable phases: α-, β-, and γ-La3Si, were formed by annealing and crystallizing amorphous La3Si. Their crystal structures are orthorhombic (a=6.32 Å,b=8.06 Å,c=9.96 Å), hcp (a=10.55 Å,c=5.05 Å), and tetragonal (a=6.92 Å,c=5.05 Å) resp.T c increased to 3.75 K, 6.00 K and 6.80 K, resp. During low temperature anneals of an amorphous La3Si alloy,T c changed logarithmically with time.
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On leave from Institute of Physics, Academica Sinica, Beijing, China
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Zhiyi, L., Zheng, W.S., Delsing, P. et al. Superconductivity, crystallization, and structural relaxation of the new metallic glass system La1−x Si x (0.15≤x≤0.27). Z. Physik B - Condensed Matter 70, 37–41 (1988). https://doi.org/10.1007/BF01320536
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DOI: https://doi.org/10.1007/BF01320536