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Spin compensation cloud and the Kondo effect

机译:自旋补偿云和近藤效应

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We have used polarised neutrons to measure the integrated magnetic cross-section of a dilute alloy of Ce in Y a Kondo system, T-K similar to 40K. Previous polarised neutron measurements of the field-induced magnetic form factor found no anomalies that could be attributed to the formation of a spin compensation cloud around the Cc ion. The present measurements, focused on the diffuse low-Q range, represent information over a very wide length scale in real space. Again, they show no changes in the Q-dependence of the form-factor at low temperatures that could be attributed to the formation of a spin compensation cloud. An alternative interpretation of the phenomenon based on the dynamical magnetic susceptibility of Y-Ce is proposed. (c) 2007 Elsevier B.V. All rights reserved.
机译:我们已经使用极化中子来测量Y Kondo系统中的Ce稀合金的积分磁截面,T-K类似于40K。以前对磁场感应的磁形状因数的极化中子测量没有发现异常,这可以归因于Cc离子周围形成自旋补偿云。当前的测量集中于漫射的低Q范围,代表了真实空间中非常宽的长度范围内的信息。同样,它们在低温下没有显示出形状因数的Q相关性变化,这可能归因于自旋补偿云的形成。提出了一种基于Y-Ce的动态磁化率的现象的替代解释。 (c)2007 Elsevier B.V.保留所有权利。

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