多自旋纳米晶Mn4的交换作用和全磁化过程
Exchange interactions and full magnetization process of multispin nanoclaster Mn4
摘要：
从理论上研究了磁性纳米团簇Mn4的全磁化过程，包括所有的多重态。得到了由实验数据确定Mn_4团簇交换常数所需的公式。结果表明，这种纳米团簇的磁化强度在兆高斯磁场范围内发生量子跃迁。所考虑的纳米团簇Mn4区别于其他多自旋分子的显著特征是其交换自旋哈密顿假设精确对角化。这为理论预测与实验数据的比较提供了可靠的依据，对发展高自旋分子研究的新实验技术具有重要意义。
英文摘要：
Full magnetization process of magnetic nanocluster Mn4, including all its actual multiplets, is theoretically investigated. The formulas needed to determine the exchange constants of cluster Mn4 from experimental data are obtained. It is shown that quantum jumps of magnetization of this nanocluster are in area of megagauss magnetic fields. Remarkable feature of considered nanocluster Mn4 differing it from other multispin molecules is that its exchange spin Hamiltonian supposes exact diagonalization. This provides a reliable basis for comparison of theoretical predictions with experimental data and is important for development of new experimental techniques of high-spin molecule research.
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