1.
Phys Rev Lett
; 84(15): 3430-3, 2000 Apr 10.
Artículo
en Inglés
| MEDLINE
| ID: mdl-11019107
RESUMEN
Recent experiments suggest that the Ising pyrochlore magnets Ho2Ti2O7 and Dy2Ti2O7 display qualitative properties of the nearest-neighbor "spin ice" model. We discuss the dipolar energy scale present in both these materials and discuss how spin-ice behavior can occur despite the presence of long-range dipolar interactions. We present results of numerical simulations and a mean field analysis of Ising pyrochlore systems. Based on our quantitative theory, we suggest that the spin-ice behavior in these systems is due to long-range dipolar interactions, and that the nearest-neighbor exchange in Dy2Ti2O7 is antiferromagnetic.
2.
Phys Rev B Condens Matter
; 54(9): 6693-6699, 1996 Sep 01.
Artículo
en Inglés
| MEDLINE
| ID: mdl-9986689