This article is cited in 2 papers

CONDENSED MATTER

Nonlinear susceptibilities of a weakly disordered uniaxial ferromagnet in the critical region

D. V. Pakhnin^a, A. I. Sokolov^a, B. N. Shalaev<sup>b

a</sup> St. Petersburg Electrotechnical University, St. Petersburg, Russia
^b Ioffe Physico-Technical Institute, Russian Academy of Sciences, St. Petersburg

Abstract: For a weakly disordered three-dimensional Ising model in the critical region, the sixth-order effective coupling constant and the fourth-and sixth-order nonlinear susceptibilities are determined. The values of these quantities are found to differ radically (by a factor of 1.5-3) from the corresponding values in a pure ferromagnet, and their measurement is suggested for the identification of the critical behavior of impure systems.

PACS: 05.50.+q, 05.70.Jk, 75.10.Hk, 75.40.Cx

Received: 11.03.2002

 English version: Journal of Experimental and Theoretical Physics Letters, 2002, 75:8, 387–390

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