Reorientation transition of ultrathin ferromagnetic films

Details Reorientation transition of ultrathin ferromagnetic films Reorientation transition of ultrathin ferromagnetic films

1997-01-08

arxiv.org/abs/cond-mat/9701043v2

Physical Review B 55, 12309 (1997)

Physics

Condensed Matter

Statistical Mechanics

4 pages(RevTeX), 3 figures (EPS)

Scientific paper

10.1103/PhysRevB.55.12309

We demonstrate that the reorientation transition from out-of-plane to in-plane magnetization with decreasing temperature as observed experimentally in Ni-films on Cu(001) can be explained on a microscopic basis. Using a combination of mean field theory and perturbation theory, we derive an analytic expression for the temperature dependent anisotropy. The reduced magnetization in the film surface at finite temperatures plays a crucial role for this transition as with increasing temperature the influence of the uniaxial anisotropies is reduced at the surface and is enhanced inside the film.

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