Multi-plateau magnetization curves of one-dimensional Heisenberg ferrimagnets
Shoji Yamamoto, Toru Sakai
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.
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