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The three-dimensional ± J Ising spin glass model is investigated by means of Monte Carlo simulation. In uniform fields of various strength, the Edwards-Anderson susceptibility χ EA Q is calculated at T =0. 9 J which is lower than the transition temperature in the zero-field case. It is found that χ EA decreases monotonically when the field strength is increased and that the data do not suggest a phase transition in a finite field. The best parameters for the scaling function of the form \ (₄₀ (H) l^ ₄₀ ( (H-H ₂) l^-) \) are estimated to be H c =0. 00 (10) J, ψ=2. 16 (22) and φ=-1. 13 (6). These results support the hypothesis that the phase transition does not exist in a finite magnetic field.
Kawashima et al. (Mon,) studied this question.