Тип публикации: статья из журнала
Год издания: 2003
Идентификатор DOI: 10.1103/PhysRevB.68.024409
Аннотация: Localized Ru5+ spins in Sr2YRuO6 form a fcc lattice with an antiferromagnetic (AFM) nearest-neighbor (NN) coupling J approximate to 25 meV and rather low Neel temperature T-N= 26 K. Analysis of the electronic structure of Sr2RuO4 results in the effective Heisenberg model. We have studied the effect of frustrations on the AFM type-IПоказать полностьюstructure of Sr2YRuO6 in the spin-wave approximation. In the model with only NN coupling the AFM state is unstable due to frustrations, and T-N = 0. Stabilization of the AFM state occurs due to the next-nearest-neighbor coupling I or due to the magnetic anisotropy D. Very small values D/J similar to I/J less than or equal to 10(-3) are enough to obtain the experimental values of T-N and sublattice magnetization m = 1.85 mu(B) /Ru (62% from the nominal S = 3/2 value).
Журнал: PHYSICAL REVIEW B
Выпуск журнала: Vol. 68, Is. 2
ISSN журнала: 24699950
Место издания: COLLEGE PK
Издатель: AMER PHYSICAL SOC