提要

我們發現燒結溫度及時間為700 ℃，1 hour及650 ℃，2 hours都可以做出二十面體的Cd100-xYbx（x = 16 & 17）準晶；400 ℃，24 hours的熱處理可以使其成為穩定態。這些準晶樣品的x-ray繞射圖中，出現在（222100）峰值前的Cd (101) 峰值的強度，與電阻率隨溫度的變化有關。而電阻係數比 (ρ4.2 K/ρ300 K ) 的大小也與磁阻的大小有關。
增加樣品中Yb的摻雜濃度，可以大幅提高磁阻的大小。對磁阻變化不大的準晶樣品，仍然可以用量子干涉理論解釋的很好。

Abstract

We found that Cd100-xYbx（x = 16 & 17） icosahedral quasicrystals can be formed at 700 ℃ for 1hour or at 650 ℃ for 2 hours. The quasicrystalline ingots were subsequently annealed at 400 ℃ for 24 hours to obtain an equilibrium phase.
We found the intensity of Cd (101) peak appearing in the front of the quasicrystalling peak ( 222100 ) correlates with the variation of the resistance with temperature ; and the magnitude of the resistivity ratio (ρ4.2 K/ρ300 K ) is closely related to that of the magnetoresistance.
Increasing the concentration of Yb greatly enhances the magnitude of the magnetoresistance. The percentage change in magnetoresistance less than about 10％, still can be explained well by the quantum interference theories.

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