Abstract

Electronic states on the surface of LaMn₂Si₂ and La_0.75Sm_0.25Mn₂Si₂ intermetallic compounds have been studied by resonant photoemission spectroscopy using synchrotron radiation, and the main regularities in the formation of the electronic structure upon partial substitution of samarium atoms for lanthanum have been found. The dependence of the shape of the spectra of the valence bands on the photon energy near the absorption edges of the internal levels of the components has been studied. The processes of direct and two-stage production of photoelectrons, elastic and inelastic channels of the decay of states with the emission of high-energy electrons due to intra-atomic Coulomb interaction have been studied. The features of the surface of the compounds at room temperature have been studied by atomic force and magnetic force microscopy. The presence of a complex magnetic domain structure in LaMn₂Si₂ in the case of partial substitution of samarium for lanthanum is also shown.

中文翻译：

---

通过共振光电子能谱和磁力显微镜研究 La1 – xSmxMn2Si2 (x = 0, 0.25) 层状金属间化合物的电子态和磁畴结构

摘要

_{LaMn 2} Si ₂和La _0.75 Sm _0.25 Mn ₂ Si ₂表面的电子态使用同步辐射通过共振光电子能谱对金属间化合物进行了研究，发现了钐原子部分取代镧后电子结构形成的主要规律。已经研究了价带光谱形状对组分内部能级吸收边缘附近的光子能量的依赖性。研究了由于原子内库仑相互作用而发射高能电子的光电子的直接和两阶段产生过程、弹性和非弹性通道的衰变过程。通过原子力和磁力显微镜研究了室温下化合物表面的特征。LaMn中存在复杂的磁畴结构还显示了在钐部分取代镧的情况下的₂ Si _{2 。}