title: Tuning magnetic anisotropies of Fe films on Si(111) substrate via direction variation of heating current.
abstract: We adopted a novel method to tune the terrace width of Si(111) substrate by varying the direction of heating current. It was observed that the uniaxial magnetic anisotropy (UMA) of Fe films grown on the Si(111) substrate enhanced with decreasing the terrace width and superimposed on the weak six-fold magnetocrystalline anisotropy. Furthermore, on the basis of the scanning tunneling microscopy (STM) images, self-correlation function calculations confirmed that the UMA was attributed mainly from the long-range dipolar interaction between the spins on the surface. Our work opens a new avenue to manipulate the magnetic anisotropy of magnetic structures on the stepped substrate by the decoration of its atomic steps.
authors.affiliation: State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Qiong
authors.initials: Q
authors.lastname: Wu
authors.forename: Wei
authors.initials: W
authors.lastname: He
authors.forename: Hao-Liang
authors.initials: HL
authors.lastname: Liu
authors.forename: Jun
authors.initials: J
authors.lastname: Ye
authors.forename: Xiang-Qun
authors.initials: XQ
authors.lastname: Zhang
authors.forename: Hai-Tao
authors.initials: HT
authors.lastname: Yang
authors.forename: Zi-Yu
authors.initials: ZY
authors.lastname: Chen
authors.forename: Zhao-Hua
authors.initials: ZH
authors.lastname: Cheng
mesh_terms: D000465:Algorithms; D016880:Anisotropy; D006358:Hot Temperature; D007501:Iron / Q000737:chemistry*; D008280:Magnetics; D016252:Microscopy, Scanning Tunneling; D008962:Models, Theoretical; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods; D012825:Silicon / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D007501:Iron; D012825:Silicon