具有不同磁性核的{M $_4$ }配位团簇（M=Co，Mn）的磁性
Magnetic properties of {M$_4$} coordination clusters with different magnetic cores (M=Co, Mn)
摘要：
我们提出了一个联合的实验和理论表征的反铁磁核的四个磁性离子的配位团簇的磁性。两种不同的化合物进行了分析，与钴和锰离子的核心。虽然这两种分子都是反铁磁的，但它们对外部磁场的敏感性不同，这取决于分子内磁耦合的强度。特别是，两个分子的磁化强度与磁场的依赖性随着温度的变化而变化：在低温下，Mn $_4$的磁化强度较小，而在高温下则相反。通过对这两种化合物的电子和磁性的详细分析，我们发现Mn $_4$ \}中磁性离子之间的磁相互作用比Co $_4$\}中的磁相互作用强.此外，Co $_4$ \}还显示出不可忽略的自旋轨道效应，这可能会影响未来反铁磁自旋电子学应用中的自旋寿命。我们强调的必要性，占这些自旋轨道效应的可靠描述这些化合物。
英文摘要：
We present a joint experimental and theoretical characterization of the magnetic properties of coordination clusters with an antiferromagnetic core of four magnetic ions. Two different compounds are analyzed, with Co and Mn ions in the core. While both molecules are antiferromagnetic, they display different sensitivities to external magnetic field, according to the different strength of the intra-molecular magnetic coupling. In particular, the dependence of the magnetization versus field of the two molecules switches with temperatures: at low temperature the magnetization is smaller in \{Mn$_4$\}, while the opposite happens at high temperature. Through a detailed analysis of the electronic and magnetic properties of the two compounds we identify a stronger magnetic interaction between the magnetic ions in \{Mn$_4$\} with respect to \{Co$_4$\}. Moreover \{Co$_4$\} displays not negligible spin-orbit related effects that could affect the spin lifetime in future antiferromagnetic spintronic applications. We highlight the necessity to account for these spin-orbit effects for a reliable description of these compounds.
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