Exact results of a dimerized S=1 Ising chain with single-ion anisotropy

Wu, Hong; Wei, Guozhu; Han, Yu; Yi, Guang-Yu; Gong, Wei‐Jiang

doi:10.1016/j.jmmm.2009.05.008

Cited by 5 publications

(1 citation statement)

References 30 publications

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“…It is worthy of notice that the special limiting case of this model system in an absence of the external magnetic field has been proposed and exactly solved by Wu et al [4,5,6] using the rigorous procedure based on the Jordan-Wigner transformation [7] (see Refs. [8,9,10] for related works on this subject). However, it has been recently shown by the present authors [11] that the exact results obtained by Wu et al [4,5] can also be recovered by another independent way by making use of the transfer-matrix method.…”

Section: Introductionmentioning

confidence: 99%

Unusual field-induced transitions in exactly solved mixed spin-(1/2, 1) Ising chain with axial and rhombic zero-field splitting parameters

Strečka

Dančo

2011

Physica B: Condensed Matter

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The mixed spin-(1/2, 1) Ising chain with axial and rhombic zero-field splitting parameters in a presence of the longitudinal magnetic field is exactly solved within the framework of decoration-iteration transformation and transfer-matrix method. Our particular emphasis is laid on an investigation of the influence of the rhombic term, which is responsible for an onset of quantum entanglement between two magnetic states S z k = ±1 of the spin-1 atoms. It is shown that the rhombic term gradually destroys a classical ferrimagnetic order in the ground state and simultaneously causes diversity in magnetization curves including intermediate plateau regions, regions with a continuous change in the magnetization as well as several unusual field-induced transitions accompanied with magnetization jumps. Another interesting findings concern with an appearance of the round minimum in the temperature dependence of susceptibility times temperature data, the double-peak zerofield specific heat curves and the enhanced magnetocaloric effect. The temperature dependence of the specific heat with three separate maxima may also be detected when driving the system through the axial and rhombic zero-field splitting parameters close enough to a phase boundary between the ferrimagnetic and disordered states and applying sufficiently small longitudinal magnetic field.

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