Intrinsic orbital and spin magnetism in Rh clusters on inert xenon matrices
Intrinsic orbital and spin magnetism in Rh clusters on inert xenon matrices
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DOI：
10.1103/physrevb.82.184413
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发表时间：
2010-11
影响因子：
3.7
通讯作者：
V. Sessi;K. Kuhnke;Jian Zhang;J. Honolka;K. Kern;C. Tieg;O. Šipr;J. Minár;H. Ebert
中科院分区：
文献类型：
--
作者：
V. Sessi;K. Kuhnke;Jian Zhang;J. Honolka;K. Kern;C. Tieg;O. Šipr;J. Minár;H. Ebert
利用X射线磁圆二色性测量了惰性氙缓冲层上准自由Rh团簇的内禀轨道磁矩和自旋磁矩。的时刻强烈变化的平均集群大小的函数。平均尺寸为N=20的RhN团簇的最大总磁矩为0.4 B/原子，轨道-自旋磁矩比高达60%，表明团簇的几何形状是双平面的。进一步研究了磁性之间的两个极端的限制，从准自由的几个原子大小的集群位于氙层上的Rh纳米结构与弱相互作用的Ag 100基板接触。密度泛函理论计算不同的集群大小和Rh-Ag协调解释了意外的淬灭Rh时刻的情况下，直接沉积Rh的Ag 100由Honolka等人报道的物理评论B 76，144412 2007。
Intrinsic orbital and spin magnetic moments of quasifree Rh clusters on inert xenon buffer layers are measured using x-ray magnetic circular dichroism. The moments strongly vary as a function of average cluster size. A maximum total moment of 0.4 B per atom and large orbital-to-spin moment ratios up to 60% appear for RhN clusters with average size N=20, suggesting that cluster geometries are biplanar. The magnetism is further studied between two extreme limits, from quasifree few-atom-sized clusters situated on a xenon layer toward Rh nanostructures in contact with a weakly interacting Ag 100 substrate. Density-functional theory calculations for different cluster sizes and Rh-Ag coordination explain the unexpected quenching of Rh moments in the case of directly deposited Rh on Ag 100 reported by Honolka et al. Phys. Rev. B 76, 144412 2007 .