Superconductivity in a representative Zr-based bulk metallic glass

The Zr41Ti14Cu12.5Ni10Be22.5 bulk metallic glass (BMG) is investigated by means of electrical measurement. A superconducting transition was observed in the BMG which belongs to a typical type-II superconductor with a high Ginzburg–Landau parameter. The superconducting critical temperature Tc and the temperature gradient ( - d H c 2 / d T ) T c of the upper critical field Hc2 near Tc is 1.62 K and 2.26 T/K, respectively. Some superconducting properties of the BMG are based on the electrical resistivity and critical field measurements. An analysis of the electron–phonon coupling constant λ indicates that the Zr41Ti14Cu12.5Ni10Be22.5 BMG is a weak-coupling superconductor with λ ≈ 0.49. The observed linearity of Hc2(t) and its extrapolated low-temperature limiting value are discussed and compared to predicted behavior for Hc2(t).