某些块状Pauli-paramgnets微粒的磁有序性
Magnetic ordering in the fine particles of some bulk Pauli-paramgnets
摘要：
一些被广泛研究的“增强型”泡利顺磁体-LuCo 2，ScCo 2，ZrCo 2和CeRu 2Si 2的细颗粒，已通过高能球磨制备和研究它们的磁行为。在Co系统的情况下，这些颗粒显示铁磁功能，即使在室温下。在CeRu 2Si 2的情况下，一个众所周知的Kondo晶格，它是非磁性的散装形式，功能可归因于低于约8 K的磁性秩序的开始，可以在细颗粒中看到。这些小粒子在高磁场下的磁矩的大小足够大，可以得出这样的结论：观察到的磁有序不仅仅是表面效应。这种在小粒子中向磁有序的转变可能在增强的泡利顺磁体中广泛存在。
英文摘要：
Fine particles of some of the extensively studied 'enhanced' Pauli paramagnets - LuCo2, ScCo2, ZrCo2 and CeRu2Si2, have been prepared by high-energy ball-milling and investigated for their magnetic behavior. In the case of Co systems, these particles show ferromagnetic features even at room temperature. In the case of CeRu2Si2, a well-known Kondo lattice which is non-magnetic in the bulk form, features attributable to the onset of magnetic order below about 8 K could be seen in the fine particles. The magnitudes of the magnetic moment of these small particles at high fields are sufficiently large to conclude that the observed magnetic ordering is not just a surface effect. This transformation to magnetic ordering in small particles could be widespread among enhanced Pauli paramagnets.
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