Multi-plateau magnetization curves of one-dimensional Heisenberg ferrimagnets
arXiv:cond-mat/0005248 · doi:10.1103/PhysRevB.62.3795
Abstract
Ground-state magnetization curves of ferrimagnetic Heisenberg chains of alternating spins $S$ and $s$ are numerically investigated. Calculating several cases of $(S,s)$, we conclude that the spin-$(S,s)$ chain generally exhibits $2s$ magnetization plateaux even at the most symmetric point. In the double- or more-plateau structure, the initial plateau is generated on a classical basis, whereas the higher ones are based on a quantum mechanism.
6 pages, 6 figures embedded, to appear in Phys. Rev. B 01 August 2000