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We report measurements of magnetic avalanches in a Fe-Ni-Co alloy. The distribution of avalanche sizes is given by P (A) A^-exp (-A/A₀), with 0ex{0ex}=0ex{0ex}1. 330. 10. The role of demagnetizing effects in the avalanche statistics is demonstrated. We analyze a simple model of interface growth and find a power law distribution of avalanche sizes over a wide range of parameters when an infinite-range demagnetization field is included. The exponents agree with those found at the critical field in the absence of demagnetization effects.
Urbach et al. (Mon,) studied this question.
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