Magnetism and morphology of Fe/Cu(111) films below two-dimensional percolation | Zendy

Jianxin Shen | Zendy; R. Skomski | Zendy; M. Klaúa | Zendy; H. Jenniches | Zendy; S. Sundar Manoharan | Zendy; J. Kirschner | Zendy

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Magnetism and morphology of Fe/Cu(111) films below two-dimensional percolation

Author(s) -

Jianxin Shen,

R. Skomski,

M. Klaúa,

H. Jenniches,

S. Sundar Manoharan,

J. Kirschner

Publication year - 1997

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.365064

Subject(s) - condensed matter physics , magnetization , magnetism , superparamagnetism , vicinal , percolation threshold , hysteresis , materials science , magnetic hysteresis , monolayer , magnetic anisotropy , percolation (cognitive psychology) , ising model , anisotropy , chemistry , nanotechnology , physics , magnetic field , optics , electrical resistivity and conductivity , organic chemistry , quantum mechanics , neuroscience , biology

The magnetic properties of γ-iron films on Cu(111) below the two-dimensional percolation threshold of about 1.4 monolayer are investigated. Iron on flat Cu(111) surfaces forms triangular patches, while it forms stripes along step edges on vicinal surfaces. The films exhibit an easy magnetization axis perpendicular to the film plane and magnetic hysteresis at sufficiently low temperatures. The magnetization curves of the triangular iron patches are discussed in terms of Ising superparamagnetism. From Kerr hysteresis loops, we deduce that the first anisotropy constant K1 in the superparamagnetic films is of order 0.345±0.020 MJ/m3.

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