The effect of non-uniform magnetic fields on the Ising-Heisenberg chain of a heterotrimetallic coordination compound Fe − Mn − Cu, modeling a magnetic impurity on one dimer is studied. This impurity is configured by imposing non-uniform magnetic fields on each sites of j−th interstitial ionic dimer Mn²⁺ −Cu²⁺ of the chain model. The quantum coherence and pairwise entanglement between spin-1/2 magnetic Mn²⁺ −Cu²⁺ ion dimers clearly depend on the site which the impurity is located. It is demonstrated that when the magnetic impurity is considered for one magnetic dimer, by altering Ising nodal exchange interaction and Heisenberg anisotropy parameter of the impurity dimer, the entanglement can be enhanced to the maximal value 1 at a special fixed magnetic field. Moreover, we find that the quantum Fisher information of the model with magnetic impurity behaves considerably different from the original model. Besides of the quantum resources like concurrence, we prove that the quantum Fisher information can be used as new quantum tool for estimating the quantum phase transition in the model under consideration. On the other hand, thermal teleportation can be significantly optimized by adjusting the magnetic impurity, and a strong increase in the average fidelity is observed. Finally, the magnetic impurity can be manipulated to locally control the thermal entanglement, coherence, quantum Fisher information and teleportation unlike the original model where it is done globally.

研究了非均匀磁场对异三金属配位化合物Fe-Mn-Cu的Ising-Heisenberg链的影响，从而在一个二聚体上模拟了磁性杂质。通过在链模型的第j-间隙离子二聚体Mn ²⁺ -Cu ²⁺的每个位置上施加非均匀磁场来配置该杂质。自旋1/2磁性Mn ²⁺ -Cu ²⁺的量子相干和成对纠缠离子二聚体显然取决于杂质所在的位置。结果表明，当将一个磁性二聚体考虑到磁性杂质时，通过改变Ising节点交换相互作用和杂质二聚体的Heisenberg各向异性参数，可以在特定的固定磁场下将纠缠度提高到最大值1。此外，我们发现具有磁性杂质的模型的量子Fisher信息的行为与原始模型有很大不同。除了并发之类的量子资源外，我们还证明了量子Fisher信息可以用作估计所考虑模型中量子相变的新量子工具。另一方面，通过调节磁性杂质可以显着优化热隐形传态，并观察到平均保真度大幅提高。最后，不同于原始模型，可以对磁性杂质进行局部控制，以控制其热纠缠，相干性，量子Fisher信息和隐形传态。