论文标题
在混合自旋 - （1/2，1）中增强的磁电效应，Ising-heisenberg两腿阶梯，具有强延伸的相互作用
Enhanced magnetocaloric effect in a mixed spin-(1/2, 1) Ising-Heisenberg two-leg ladder with strong-rung interaction
论文作者
论文摘要
使用转移矩阵形式主义在绝热的消除磁性过程中精确检查了带有二聚体交替的两腿梯子上的混合自旋（1/2,1）的磁性和磁性特性。我们通知该模型的磁化曲线在饱和值的某些合理分数下表现出高原曲线，这是施加磁场和循环四旋外相互作用的函数。我们精确地研究了附近模型的冷却/加热的能力，即不连续的地面相变发生的临界点。可以证明，该模型在磁化步骤和跳跃的接近度中表现出增强的磁化效果，并伴随着二聚体自旋的相关功能的高原和跳跃。我们得出的结论是，不仅可以通过施加的磁场变化来愉快地证明模型的冷却/加热能力，而且还可以很好地证明模型的典型循环四旋速率相互作用，从而确定模型的磁化效应的效率至关重要。
The magnetic and magnetocaloric properties of the mixed spin-(1/2,1) Ising-Heisenberg model on a two-leg ladder with dimer-rung alternation are exactly examined under an adiabatic demagnetization process using the transfer-matrix formalism. We notify that the magnetization curve of the model exhibits plateaux as a function of the applied magnetic field and cyclic four-spin Ising interaction at certain rational fractions of the saturation value. We precisely investigate the ability of cooling/heating of the model nearby the critical points at which discontinuous ground-state phase transition occurs. It is evidenced that the model manifests an enhanced magnetocaloric effect in a proximity of the magnetization steps and jumps, accompanying with the plateaux and jumps of correlation function of the dimer spins. We conclude that not only the cooling/heating capability of the model could be pleasantly demonstrated by the applied magnetic field variations, but also a typical cyclic four-spin Ising interaction plays essential role to determine an efficiency of the magnetocaloric effect of the model.
