Spin-dependent Mn K-edge XANES of MnO and MnF2: Full multiple-scattering analysis.

Spin-dependent Mn K-edge XANES of MnO and MnF2: Full multiple-scattering analysis.
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MnO 和 MnF2 的自旋相关 Mn K 边 XANES:完整的多重散射分析。

DOI:
10.1103/physrevb.52.11757
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发表时间:
1995
期刊:
Physical review. B, Condensed matter
影响因子:
--
通讯作者:
Bianconi
Bianconi
中科院分区:
--
文献类型:
--
作者:
Soldatov;Ivanchenko;Kovtun;Della Longa S;Bianconi

文献摘要

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我们对 MnO 和 MnF 2 的自旋相关 Mn K 边缘 XANES(x 射线吸收近边缘结构)进行了自洽完全多重散射分析。我们的方法基于小团簇的连续自洽场自旋极化计算和大尺寸团簇内 XANES 的完全多重散射计算。对于 MnO 情况,我们考虑了周围原子的九个壳层,对于 MnF 2 情况,我们考虑了五个壳层。我们成功地计算了吸收阈值以上连续谱中 40 eV 能量范围内的自旋相关 XANES,与实验数据一致。结果表明,自旋相关的跃迁矩阵元素和 Mn p 部分态密度对 MnO 和 MnF 2 的自旋相关的 Mn K 边 XANES 都有贡献。
We have performed the self-consistent full multiple-scattering analysis of the spin-dependent Mn K-edge XANES (x-ray-absorption near-edge structure) of MnO and MnF 2. Our approach is based on successive self-consistent-field spin-polarized calculations of small clusters and full multiple-scattering calculations of XANES within large size clusters. We have considered a cluster of nine shells of surrounding atoms for the MnO case and five shells for the MnF 2 case. We have succeeded in calculating the spin-dependent XANES over a 40-eV energy range in the continuum above the absorption threshold in agreement with experimental data. The results show that both the spin-dependent transition matrix element and Mn p partial density of states contribute to the spin-dependent Mn K-edge XANES of MnO and MnF 2.