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利用脉冲激光溅射(PLD)和分子束外延(MBE)方法制备了超薄膜系统Co/Pd/Cu(100).脉冲激光溅射生长的单原子Pd层呈现了很好的二维生长模式.在这个Pd表面上,分子束外延生长的Co层直至12个原子层都表现了层-层生长模式.利用俄歇电子谱(AES)和低能电子衍射(LEED)研究了该系统的表面结构.利用低温磁光克效应(MOKE)研究了系统的磁学性质.结构研究表明,Co层由于面内晶格失配应力而具有一个四方正交结构;与对比样品Co/Cu(100)的比较研究说明Pd层的存在强烈地改善了Co膜的起始生长模式和结构.磁光克效应测量表明,Pd层的存在改变了Co层的磁学性质.
The ultra-thin film system Co / Pd / Cu (100) was fabricated by pulsed laser sputtering (PLD) and molecular beam epitaxy (MBE) .The single-atom Pd layer grown by pulsed laser sputtering showed a good two- On this Pd surface, the molecular beam epitaxially grown Co layer up to 12 atomic layers showed layer-to-layer growth mode.The surface structure of this system was studied by Auger electron spectroscopy (AES) and low energy electron diffraction (LEED). The magnetocaloric properties of the system were investigated by using the low-temperature magneto-optic gram effect (MOKE) .Structural studies show that the Co layer has a tetragonal orthogonality due to the in-plane lattice mismatch stress. Compared with the comparative sample Co / Cu (100) The results show that the existence of Pd layer strongly ameliorates the initial growth mode and structure of Co film.The measurement of magneto-optical gram effect shows that the presence of Pd layer changes the magnetic properties of Co layer.