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首页> 外文会议>Symposium on Quasicrystals held November 30-December 2,1998,Boston,Massachusetts,U.S.A. >Neutron scattering study of antiferromagnetic correlations in the Zn-Mg-Ho icosahedral quasicrystal
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Neutron scattering study of antiferromagnetic correlations in the Zn-Mg-Ho icosahedral quasicrystal

机译：Zn-Mg-Ho二十面体准晶体中反铁磁相关性的中子散射研究

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摘要

Magnetism in the Zn-Mg-Ho icosahedral quasicrystal has been studied by neutron scattering.Powder samples of the icosahedral and related crystalline phases were reexamined to clarify the origin of hte previously-reported long-range magnetic order [Charrier et al.,PhysRev.Lett.78 (1997) 4637].the long range order was found to originate from the related crystalline phase,which is a contaminant in the previously-used samples.whereas for high-quality icosahedral phase,we could detect only magnetic diffuse scattering.This apparently shows the absence of the long range order in hte icosahedral phase.the diffuse scattering was studied in detail by using a single quasicrystalline sample.It was found that the diffuse scattering appears as satellites from intense nuclear bragg reflections.This indicates that corresponding spin correlations can be regarded as develoed betwen spins on the six-dimensional virtual hypercubic lattice.A magnetic modulation vector for the correlations is propsoed as q_m~6D =(3/4,0,0,1/1,3/4,1/2).
机译：通过中子散射研究了Zn-Mg-Ho二十面体准晶体中的磁性。对二十面体和相关晶相的粉末样品进行了重新检查，以阐明先前报道的远距离磁序的起源[Charrier等，PhysRev。 Lett.78（1997）4637]。发现远距离有序是由相关的结晶相引起的，而结晶相是以前使用的样品中的一种污染物。而对于高质量的二十面体相，我们只能检测到磁漫散射。这显然表明二十面体相中没有远距离有序性，通过使用单个准晶体样品对扩散散射进行了详细研究，发现扩散散射表现为来自强烈核布拉格反射的卫星，这表明相应的自旋可以将相关视为在六维虚拟超立方晶格上的发展后的自旋。将相关的磁调制矢量提议为q_m 〜6D =（3 / 4,0,0,1 / 1,3 / 4,1 / 2）。

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