J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988Proceedings of the International Conference on Magnetism
|Page(s)||C8-1215 - C8-1216|
J. Phys. Colloques 49 (1988) C8-1215-C8-1216
STRUCTURE FACTOR OF THE RANDOM FIELD ISING MODELM. C. Tringides1, I. Kwon1, C. M. Soukoulis1 et Gary S. Grest2
1 Ames Laboratory and Department of Physics, Iowa State University, Ames, Iowa 50011, U.S.A.
2 Corporate Research Science Laboratory Exxon Research and Engineering Company Annandale, NJ 08801, U.S.A.
Using Monte Carlo simulations, we studied the structure factor S (q) of the two-dimensional (2D) random field Ising model (RFIM) with a binary probability distribution. We observe that S (q) changes its lineshape from Lorentzian to a Lorentzian-three half form, (LRZ)3/2 as the random field and temperature are lowered. The time dependent structure factor S (q, t) after a quench from a paramagnetic phase to low temperatures is also studied. These results can provide a better understanding of diffraction scattering experiments performed on RFIM.