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首页> 外文会议>International Conference on Nanotechnologies and Biomedical Engineering >Slow Relaxation of Magnetization in a Family of Linear Mn~(III)M~(III)Mn~(III) (M = Fe, Ru, Os) Compounds
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Slow Relaxation of Magnetization in a Family of Linear Mn~(III)M~(III)Mn~(III) (M = Fe, Ru, Os) Compounds

机译：在一系列线性Mn〜（III）M〜（III）Mn〜（III）（M = Fe，Ru，OS）化合物中缓慢放松磁化

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摘要

The experimental and theoretical study of a family of linear trimeric [NEt4] {[Mn(L)]2[M(CN)6]} (M = Fe, Ru, Os) compounds is reported. All three complexes demonstrate slow relaxation of magnetization at low temperatures. The theoretical model for the explanation of the magnetic behavior (the magnetic susceptibility as a function of temperature and magnetization as a function of the applied magnetic field) includes the spin-orbital interaction acting within the ground ~2T1 multiplet of the Fe~(III), Ru~(III) or Os~(III) ion, the axial crystal field that splits this multiplet into an orbital singlet and orbital doublet, the zero-field splitting for the Mn~(III) ions, the isotropic exchange interaction in the M-Mn pairs as well as the inter-cluster interaction taken within the mean field approximation. The proposed model provides a good agreement between the observed and calculated magnetic behavior. The low-lying energy levels form the energy barriers for magnetization reversal for all examined compounds. The calculated heights of these barriers are close to the observed ones.
机译：据报道了一种线性三聚体[Net4] {[Mn（1）] 2 [M（CN）6]}（M = Fe，Ru，OS）化合物的实验和理论研究。所有三个配合物都表现出在低温下磁化缓慢的放松。用于解释磁性的理论模型（作为施加磁场的函数的温度和磁化函数的磁化率）包括作用在地下〜2T1多功能的旋转轨道相互作用。（III） ，ru〜（iii）或os〜（iii）离子，将该多功能分成轨道单态和轨道双齿轮的轴晶场，用于Mn〜（iii）离子的零场分裂，各向同性交换相互作用M-Mn对以及在平均场近似内采取的簇间交互。所提出的模型在观察和计算的磁性行为之间提供了良好的一致性。对于所有检查的化合物，低位能量水平形成用于磁化反转的能量屏障。这些障碍的计算高度靠近观察到的。

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