Classical generalized constant coupling model for geometrically frustrated antiferromagnets

Дата и время публикации : 2000-10-06T17:38:31Z

Авторы публикации и институты :
A. J. Garcia-Adeva
D. L. Huber

Ссылка на журнал-издание: Phys. Rev. B 63, 140404 (2001)
Коментарии к cтатье: 4 pages, 3 figures, 2 columns. Discussion about the zero T value of the pyrochlore specific heat corrected
Первичная категория: cond-mat.str-el

Все категории : cond-mat.str-el

Краткий обзор статьи: A generalized constant coupling approximation for classical geometrically frustrated antiferromagnets is presented. Starting from a frustrated unit we introduce the interactions with the surrounding units in terms of an internal effective field which is fixed by a self consistency condition. Results for the magnetic susceptibility and specific heat are compared with Monte Carlo data for the classical Heisenberg model for the pyrochlore and kagome lattices. The predictions for the susceptibility are found to be essentially exact, and the corresponding predictions for the specific heat are found to be in very good agreement with the Monte Carlo results.

Category: Physics