On the growth of icosahedral Al-Pd-Mn quasicrystals from the ternary melt
On the growth of icosahedral Al-Pd-Mn quasicrystals from the ternary melt
复制标题
三元熔体生长二十面体 Al-Pd-Mn 准晶
DOI：
--
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
P. Canfield
中科院分区：
文献类型：
--
作者：
I. Fisher;M. Kramer;T. Wiener;Z. Islam;A. R. Ross;T. Lograsso;A. Kracher;A. Goldman;P. Canfield
Abstract Icosahedral Al71Pd21,Mn8 quasicrystals have been grown from the ternary melt via a ‘self-flux’ technique. The nucleation is exceptionally well controlled, and individual grains can have masses of up to almost 30 g (limited only by the dimensions of the growth crucible). The quasicrystals grown by this technique are readily separated from the melt by decanting and clearly manifest a dodecahedral morphology with pentagonal facets. X-ray and electron-diffraction data indicate a remarkably well-ordered structure. with a correlation length of over 1000 A. The magnetic susceptibility has a temperature-independent diamagnetic component and a temperature-dependent paramagnetic term. For temperatures greater than approximately 60 K, the paramagnetic term follows a Curie-Weiss temperature dependence characterized by an average effective moment of 0.62 ± 0.02μB/Mn and a Weiss temperature of −12.8 ± 0.1 K. Deviations from the Curie-Weiss temperature dependence for temperatures less than approximately 60 K ma...
