Doubling of the orbital magnetic moment in nanoscale Fe clusters
Doubling of the orbital magnetic moment in nanoscale Fe clusters
复制标题
DOI：
10.1103/physrevb.60.472
复制
发表时间：
1999-07-01
影响因子：
3.7
通讯作者：
Brookes, NB
中科院分区：
文献类型：
--
作者：
Edmonds, KW;Binns, C;Brookes, NB
磁圆二色性已被用于研究在超高真空中从气体聚集源原位沉积到高度定向热解石墨上的支撑纳米级铁簇中的轨道和自旋矩。低覆盖度的质量过滤（2.4 MI，610 个原子）和未过滤（1-5 nm，40-5000 个原子）团簇的轨道磁矩约为块状 Fe 的两倍。随着覆盖范围的增加，未过滤簇的轨道矩收敛到体积值。作为覆盖率函数的自旋矩没有可检测到的变化。经过质量过滤的团簇显示出磁偶极矩的增加，我们将其归因于其较高的冲击能量导致的畸变。发现剩磁随着覆盖范围的增加而增加。 [S0163-1829(99)02225-0]。
Magnetic circular dichroism has been used to study the orbital and spin moments in supported nanoscale Fe clusters deposited in situ from a gas aggregation source onto highly oriented pyrolitic graphite in ultrahigh vacuum. Mass-filtered (2.4 MI, 610 atoms) and unfiltered (1-5 nm, 40-5000 atoms) clusters at low coverage have an orbital magnetic moment about twice that of bulk Fe. With increasing coverage the orbital moment of the unfiltered clusters converges to the bulk value. There is no detectable change in the spin moment as a function of coverage. Mass-filtered clusters show an increase in the magnetic dipole moment which we ascribe to distortion resulting from their higher impact energy. An increasing magnetic remanence with coverage is found. [S0163-1829(99)02225-0].