【摘要】 本文报道了利用非晶合金的高压变态,合成新亚稳超导相La₄Au的结果,非晶La₈₀Au₂₀合金是用液态超急冷法制备的,合成条件为80kbar、250℃,该相具有正交结构,晶格参数为α=6.54A,b=7.71A,C=11.32A,超导临界温度Tc达5.5K,高于所有已知La-Au相的值。更多还原

【Abstract】 In this puper, we report the synthesis of a new metastable phase La4Au by means of high pressure high temperature treatment of an amorphous alloy. As starting material, the La80 Au20 amorphous ribbons were prepared from melt by rapid quenching method. Synthesis conditions were found to be at about 80kbar and 250℃. This new phase has a orthorhombic structure with lattice parameters a = 6.54 A, b = 7.71 A and c=11.32 A, and exhibits superconducting transition at Tc=5.5 K which is higher than that of any known La-Au phases.更多还原