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首页> 外文期刊>Physica, B. Condensed Matter >Breakdown of an intermediate plateau in the magnetization process of anisotropic spin-1 Heisenberg dimer: Theory vs. experiment
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Breakdown of an intermediate plateau in the magnetization process of anisotropic spin-1 Heisenberg dimer: Theory vs. experiment

机译：各向异性自旋1 Heisenberg二聚体的磁化过程中的中间平台的分解：理论与实验

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摘要

The magnetization process of the spin-1 Heisenberg dimer model with the uniaxial or biaxial single-ion anisotropy is particularly investigated in connection with recent experimental high-field measurements performed on the single-crystal sample of the homodinuclear nickel(II) compound [Ni2(Medpt)2(μ-ox)(H2O)2](ClO4)2·2H2O (Medpt=methyl-bis(3-aminopropyl)amine). The results obtained from the exact numerical diagonalization indicate a striking magnetization process with a marked spatial dependence on the applied magnetic field for arbitrary but finite single-ion anisotropy. It is demonstrated that the field range, which corresponds to an intermediate magnetization plateau emerging at a half of the saturation magnetization, basically depends on a single-ion anisotropy strength as well as a spatial orientation of the applied field. The breakdown of the intermediate magnetization plateau is discussed at length in relation to the single-ion anisotropy strength.
机译：特别是结合最近对同核镍（II）化合物[Ni2（单晶）样品进行的实验高场测量，特别研究了具有单轴或双轴单离子各向异性的spin-1 Heisenberg二聚体模型的磁化过程。 Medpt）2（μ-ox）（H2O）2]（ClO4）2·2H2O（Medpt =甲基-双（3-氨基丙基）胺）。从精确的数字对角化获得的结果表明，对于任意但有限的单离子各向异性，其磁化过程非常醒目，并且对所施加的磁场具有明显的空间依赖性。已经证明，对应于在饱和磁化强度的一半处出现的中间磁化平台的场范围基本上取决于单离子各向异性强度以及所施加场的空间方向。关于单离子各向异性强度详细讨论了中间磁化高原的破坏。

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