MBE GROWTH OF MAGNETIC NANO-WIRES ON OFF-CUT SUBSTRATES AND ITS APPLICATION TO MAGNETIC NANO-DEVICES

MBE Grown Co/Pt superlattices被调查了。The films were epitaxially grown on MgO （100） and （111） substrates as MgO （100）， [010]//Ag， Co/Pt （100）， [010] and MgO （111）， [110]//Ag， Co/Pt [110]， respectively。The Perpendicular Anisotropy是对电影方向的强烈依赖。RHEED的结构分析揭示了在（100）电影平面上较大的张力链的存在。（100）电影展示了与（111）电影相比的较大负体积的异氮，其中通过正磁常数解释了磁性弹性效应，如Fcc公司D2100-D2.较大的磁性晶体管的异氮学通过对薄膜平面上的异氮能的分析找到了。The （100） and （111） films showed in-plane anisotropy with four fold and six fold symmetry， respectively and their values were considerably enhanced with decreasing cothickness in Co/Pt superlattices.PtイイD250イイD250イエD2アloy films have been grown by MBE method onto heated MgO （100） and （111） substrates。它发现了一部带有CuPt类型结构的电影，在300度的温度下生长。Whereas， the cr0 structure of the films grown onto （111） substrate at 500 and onto （100） substrate at 300 and 400 becomes PtCo ordered phase with AuCu structure。The film of the CuPt type exhibits a very large perpendicular magnetic anisotropy of 1. 0 ×10イD16イD1J/mイD13イエD1， due to the layered structure along the film normal direction。The spectrum of？r rotation？D2k？D2 of the film with CuPt structure is considerably different from that of AuCu structure， not exhibiting a maximum around 4. 0 eV but takes a peak at 1. 4 eV。

Magnetic anisotropy in MBE grown Co/Pt superlattices were investigated. The films were epitaxially grown on MgO (100) and (111) substrates as MgO (100), [010]//Ag, Co/Pt (100), [010] and MgO (111), [110]//Ag, Co/Pt [110], respectively. The perpendicular anisotropy were strongly dependent on the film orientation. Structural analysis by RHEED revealed the existence of a large tensile strain in the Co plane of the (100) films. The (100) films exhibit larger negative volume anisotropy compared to the (111) films, which is explained by the magnetoelastic effect through the positive magnetostriction constant λィイD2100ィエD2 of fcc Co. The large magnetocrystalline anisotropy was found by the analysis of the anisotropy energy in the film plane. The (100) and (111) films showed in-plane anisotropy with four fold and six fold symmetry, respectively and their values were considerably enhanced with decreasing Co thickness in Co/Pt superlattices.PtィイD250ィエD2CoィイD250ィエD2 alloy films have been grown by MBE method onto heated MgO (100) and (111) substrates. It is found that the film with CuPt type structure is grown onto (111) substrate at a temperature of 300゜. Whereas, the crystal structure of the films grown onto (111) substrate at 500゜ and onto (100) substrate at 300゜ and 400゜ becomes PtCo ordered phase with AuCu structure. The film of the CuPt type exhibits a very large perpendicular magnetic anisotropy of 1.0×10ィイD16ィエD1 J/mィイD13ィエD1, due to the layered structure along the film normal direction. The spectrum of Kerr rotation θィイD2kィエD2 of the film with CuPt structure is considerably different from that of AuCu structure, not exhibiting a maximum around 4.0 eV but takes a peak at 1.4 eV.