摘要(英) |
The nanoparticles were fabricated employing the gas-condensation method, using a chamber equipped with two decoupled evaporation sources for separate evaporation of In or Sn. XRD patterns and TEM images is utilized to determine the mean particle diameter, size distribution of the powder and nano-sized core@shell structure of β-In3Sn@In/γ-InSn4@Sn. 14 nm/37 nm is diameter ofβ-In3Sn/γ-InSn4, 5.5 nm/3.4 nm is thickness with In/Sn. 5.65 K/5.37 K/2.84 K is critical temperature ofβ-In3Sn/γ-InSn4/In.
The superconducting and magnetic properties are studied by AC magnetic susceptibility and magnetization measurements, in which magnetic properties and superconductivity are observed. The AC magnetic susceptibility has an inversion at 3 K, because the critical temperature is difference on core and shell. Magnetic hysteresis increase dependent on temperature cooling or packing fraction increasing. |
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