Hysteresis Loop Critical Exponents in 6-Epsilon Dimensions

Details Hysteresis Loop Critical Exponents in 6-Epsilon Dimensions Hysteresis Loop Critical Exponents in 6-Epsilon Dimensions

1993-10-15

arxiv.org/abs/cond-mat/9310038v1

Phys. Rev. Lett. 71, 3222 (1993)

Physics

Condensed Matter

10 pages + 2 figures appended, RevTex 3.0, kdjps10/93

Scientific paper

10.1103/PhysRevLett.71.3222

The hysteresis loop in the zero-temperature random-field Ising model exhibits a critical point as the width of the disorder increases. Above six dimensions, the critical exponents of this transition, where the "infinite avalanche" first disappears, are described by mean-field theory. We expand the critical exponents about mean-field theory, in 6-epsilon dimensions, to first order in epsilon. Despite epsilon=3, the values obtained agree reasonably well with the numerical values in three dimensions.

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