Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1594054 | Solid State Communications | 2010 | 4 Pages |
Discrete and jerky jumps during the process of magnetization reversal in ferromagnetic systems cause Barkhausen intermittency. We have investigated critical scaling behavior of the Barkhausen avalanche of 2-dimensional γ-Fe4N thin films using a magneto-optic microscope magnetometer (MOMM) capable of time-resolved magnetic domain images. A statistical analysis of the fluctuating size of Barkhausen jumps from numerous repetitive experiments shows a power-law scaling behavior in the ferromagnetic iron nitride system exhibiting a critical exponent value of τ=1.02τ=1.02 within the experimental error. The value of critical exponent is found to manifest universality irrespective of the degree of texture of the film induced by annealing temperature.