Equilibrium random-field Ising critical scattering in the antiferromagnet Fe(0.93)Zn(0.07)F2

Дата и время публикации : 1998-09-01T16:20:21Z

Авторы публикации и институты :
Z. Slanic
D. P. Belanger
J. A. Fernandez-Baca

Ссылка на журнал-издание: Phys. Rev. Letters 82, 426 (1999)
Коментарии к cтатье: 4 pages, 1 figure, minor revisions
Первичная категория: cond-mat.dis-nn

Все категории : cond-mat.dis-nn, cond-mat.stat-mech

Краткий обзор статьи: It has long been believed that equilibrium random-field Ising model (RFIM) critical scattering studies are not feasible in dilute antiferromagnets close to and below Tc(H) because of severe non-equilibrium effects. The high magnetic concentration Ising antiferromagnet Fe(0.93)Zn(0.07)F2, however, does provide equilibrium behavior. We have employed scaling techniques to extract the universal equilibrium scattering line shape, critical exponents nu = 0.87 +- 0.07 and eta = 0.20 +- 0.05, and amplitude ratios of this RFIM system.

Category: Physics