Weigand F, Goering E, Geissler J, Justen M, Dörr K, Ruck K, Schütz G
Lehrstuhl für Experimentelle Physik IV, Universität Würzburg, Germany.
J Synchrotron Radiat. 2001 Mar 1;8(Pt 2):431-3. doi: 10.1107/s0909049500016903.
X-ray Magnetic Circular Dichroism (XMCD) measurements of the Ruddlesden-Popper Phase La1,2Nd0,2Sr1.6Mn2O7 are reported. The Mn K. La and Nd L2,L3 edges have been measured on a powder sample at two different magnetic fields at low temperature. The analysis of the spectra at B = 1T indicates a large orbital moment of the Nd 5d-states and a significant spin-polarization of the La 5d-band. Furthermore at the Mn K-edge a XMCD-signal is observed, showing a polarization of the Mn 4p-band. At lower field (0.2T) all XMCD-signals are about two times smaller corresponding to the lower total magnetization. The signal at the Nd L2 edge vanishes completely at 0.2T.
报道了对Ruddlesden-Popper相La1.2Nd0.2Sr1.6Mn2O7的X射线磁圆二色性（XMCD）测量。在低温下，在粉末样品上于两个不同磁场测量了Mn K、La和Nd L2、L3边。在B = 1T时对光谱的分析表明Nd 5d态具有较大的轨道矩，且La 5d带存在显著的自旋极化。此外，在Mn K边观察到一个XMCD信号，表明Mn 4p带存在极化。在较低磁场（0.2T）下，所有XMCD信号约小两倍，这与较低的总磁化强度相对应。Nd L2边的信号在0.2T时完全消失。
