58 research outputs found
Magnetic properties of delta- and kagome-like chains with competing interactions
We study the delta-chain with spin- on basal sites and spin-
on apical sites. The Heisenberg interaction between neighbor basal spins is
antiferromagnetic (AF) and the interaction between basal and apical spins is
ferromagnetic (F). We show that the magnetization curve of this model is the
same as that of the spin- kagome-like chain with competing
Heisenberg interactions. The ground state phase diagram of the latter as a
function of the ratio between the AF and F interaction, , consists of
the ferromagnetic, ferrimagnetic and singlet phases. We study the magnetic
properties in each ground state phase and analyze the magnetization curves. We
show that there are magnetization plateaus and jumps in definite regions of
value . We compare the magnetic properties of considered models with
those of the spin- delta chain.Comment: 20 pages, 9 figure
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