Sum Rules and Fundamental Spectra of Magnetic X-Ray Dichroism in Crystal Field Symmetry.
Sum Rules and Fundamental Spectra of Magnetic X-Ray Dichroism in Crystal Field Symmetry.
复制标题
晶体场对称性中磁 X 射线二色性的求和规则和基本谱。
DOI：
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发表时间：
1994
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通讯作者：
G. Laan
中科院分区：
文献类型：
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作者：
G. Laan
X射线吸收和光电发射的求和规则[Thole等人，物理修订信函68（1992）1943; 70（1993）2499]，其将磁性圆二色性和线性二色性的积分信号与轨道磁矩和四极矩联系起来，并将其推广到点群对称。光谱的偏振依赖性是通过分离几何结构和物理性质得到的。基本谱的数目等于点群中重耦合矩的全对称表示的数目。圆柱对称特别简单，因为它有自然基lm。所给出的结果可用于使用线偏振和圆偏振X射线测量含有过渡金属、稀土或锕系离子的磁性材料。
The sumrules for X-ray absorption and photoemission [Thole et al ., Phys. Rev. Lett. 68 (1992) 1943; 70 (1993) 2499] which relate the integrated signals of the magnetic circular and linear dichroism to the orbital magnetic moment and quadrupole moment are generalized to point group symmetry. The polarization dependence of the spectra is obtained by separating the geometry from the physical properties. The number of fundamental spectra is equal to the number of total symmetric representations of the recoupled moment in the point group. Cylindrical symmetry is particularly simple because it has the natural basis lm. The presented results can be useful for measurements of magnetic materials that contain transition metal, rare earth or actinide ions using linearly and circularly polarized X-rays.