Self-similar magnetoresistance of Fibonacci ultrathin magnetic films

Details Self-similar magnetoresistance of Fibonacci ultrathin magnetic films Self-similar magnetoresistance of Fibonacci ultrathin magnetic films

1999-07-13

arxiv.org/abs/cond-mat/9907200v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 EPS figures, REVTeX, accepted for publication in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.60.9264

We study numerically the magnetic properties (magnetization and magnetoresistance) of ultra-thin magnetic films (Fe/Cr) grown following the Fibonacci sequence. We use a phenomenological model which includes Zeeman, cubic anisotropy, bilinear and biquadratic exchange energies. Our physical parameters are based on experimental data recently reported, which contain biquadratic exchange coupling with magnitude comparable to the bilinear exchange coupling. When biquadratic exchange coupling is sufficiently large a striking self-similar pattern emerges.

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