Self similar Barkhausen noise in magnetic domain wall motion

Details Self similar Barkhausen noise in magnetic domain wall motion Self similar Barkhausen noise in magnetic domain wall motion

1996-10-07

arxiv.org/abs/cond-mat/9610053v2

Physics

Condensed Matter

Statistical Mechanics

7 pages, RevTex. To appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.77.3855

A model for domain wall motion in ferromagnets is analyzed. Long-range magnetic dipolar interactions are shown to give rise to self-similar dynamics when the external magnetic field is increased adiabatically. The power spectrum of the resultant Barkhausen noise is of the form $1/\omega^\alpha$, where $\alpha\approx 1.5$ can be estimated from the critical exponents for interface depinning in random media.

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