In-plane magnetic reorientation in coupled ferro- and antiferromagnetic thin films

Details In-plane magnetic reorientation in coupled ferro- and antiferromagnetic thin films In-plane magnetic reorientation in coupled ferro- and antiferromagnetic thin films

2003-02-26

arxiv.org/abs/cond-mat/0302535v1

Phys. Rev. B 66, 220407 (2002) (rapid communication)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.66.220407

By studying coupled ferro- (FM) and antiferromagnetic (AFM) thin film systems, we obtain an in-plane magnetic reorientation as a function of temperature and FM film thickness. The interlayer exchange coupling causes a uniaxial anisotropy, which may compete with the intrinsic anisotropy of the FM film. Depending on the latter the total in-plane anisotropy of the FM film is either enhanced or reduced. Eventually a change of sign occurs, resulting in an in-plane magnetic reorientation between a collinear and an orthogonal magnetic arrangement of the two subsystems. A canted magnetic arrangement may occur, mediating between these two extremes. By measuring the anisotropy below and above the N\'eel temperature the interlayer exchange coupling can be determined. The calculations have been performed with a Heisenberg-like Hamiltonian by application of a two-spin mean-field theory.

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