Quadrupolar excitation channels at the L3 edge of rare-earth ions probed by resonant inelastic x-ray scattering
Quadrupolar excitation channels at the L3 edge of rare-earth ions probed by resonant inelastic x-ray scattering
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DOI：
10.1103/physrevb.60.13497
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发表时间：
1999-11-15
影响因子：
3.7
通讯作者：
Tonnerre, JM
中科院分区：
文献类型：
--
作者：
Bartolomé, F;Krisch, MH;Tonnerre, JM
本文用共振非弹性X射线散射方法研究了R_2Fe_（14）B金属间化合物中稀土离子的L-3吸收边。四极（E2）和偶极（E1）中间态激发通道的能量位置和相对强度提取的非弹性散射光谱分解成它们的主要贡献。对于四极部分理论计算可用的情况，发现谱形符合得很好，随着原子序数的增加，F1和E2激发通道之间的能量差单调增加，相对强度减小。这项工作提供了重要的实验数据的应用磁光求和规则的5d波段的稀土系统，以及验证的理论模型，旨在正确描述的X射线磁谱在金属系统中的稀土的L边缘。[S0163-1829（99）00440-3]。
A systematic resonant inelastic x-ray scattering study at the L-3 absorption edge of rare-earth ions in the R2Fe14B intermetallics is presented. The energy position and the relative strength of quadrupolar (E2) and dipolar (E1) intermediate-state excitation channels are extracted by decomposing the inelastic scattering spectra into their main contributions. For the cases in which theoretical calculations of the quadrupolar part are available, a good agreement for the spectral shape is found. With increasing atomic number, a monotonic increase of the energy difference and a decrease of the relative strength between Fl and E2 excitation channels is observed. This work provides important experimental data for the application of magneto-optical sum rules to the 5d band of rare-earth systems, as well as for the validation of theoretical models aimed at a correct description of x-ray magnetic spectroscopies at the L edges of rare earths in metallic systems. [S0163-1829(99)00440-3].