Kiyomi Okamoto

Quantum magnetization plateaux of an anisotropic ferrimagnetic spin chain

The magnetization curve of the

Inversion phenomena of the anisotropies of the Hamiltonian and the wave-function in the distorted diamond type spin chain

(S,s)=(1,1/2)

Magnetization Plateau of S = 1 Spin Ladder BIP-TENO

ferrimagnetic alternating spin chain with single-ion anisotropy D is investigated with the numerical exact diagonalization of finite clusters and size-scaling analyses. The system has a plateau at (1/3) of the saturation moment, which corresponds to the spontaneous magnetization for

Magnetization plateau in the S = 1 spin ladder with competing interactions

D=0.

Finite-Field Ground State of the S=1 Antiferromagnetic–Ferromagnetic Bond-Alternating Chain

Varying D in the 1/3-magnetized ground state under the external field along the axis of D, a quantum phase transition is revealed to occur at the critical value

Anomalous magnetization process in frustrated spin ladders

D/J=1.114ifmmodepmelsetextpmfi{}0.001

Spin-Peierls mechanism for the non-trivial magnetization plateaux in two-leg spin ladders

where the plateau vanishes. Except for the critical point, the plateau is always opening, but the mechanism is different between

Theory of excitation modes in diamond chain compound

Dl{D}_{c}

Half Plateau Phase Diagram in Generalized Zig-Zag Spin Ladder

and

Ground-state phase diagram of the S = 1/2 distorted diamond type spin chain with ferromagnetic interactions

Dg{D}_{c}.