Slow Magnetic Relaxations of Ni(III) Complexes Toward Molecular Spin Qubits
Slow Magnetic Relaxations of Ni(III) Complexes Toward Molecular Spin Qubits
复制标题
Ni(III) 配合物向分子自旋量子位的慢磁弛豫
DOI：
10.1002/ejic.202300125
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发表时间：
2023
影响因子：
2.3
通讯作者：
Yamashita Masahiro
中科院分区：
文献类型：
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作者：
Toshima Keiga;Sato Tetsu;Horii Yoji;Sato Kazunobu;Sugisaki Kenji;Breedlove Brian;Takaishi Shinya;Li Zhao-Yang;Yamashita Masahiro
基于分子的磁性材料是利用自旋弛豫行为的分子自旋量子位的有希望的候选者。据报道，各种 S=1/2 的过渡金属配合物可充当具有长自旋-自旋弛豫时间 (T2) 的自旋量子位。然而，由于 Ni(III) 化合物通常不稳定，低自旋 Ni(III) 配合物的自旋量子位特性尚不为人所知。我们在此报告了三种低自旋 Ni(III) 基配合物（S=1/2）在磁稀释条件下的慢磁弛豫行为和 T2 值。具有八面体结构的[Ni(cyclam)X2]Y (cyclam=1,4,8,11-四氮杂环十四烷)和具有方形平面结构的[Ni(mnt)2]−(mnt=马来腈二硫醇)在直流偏置场存在下经历缓慢的磁弛豫。从电子自旋共振 (ESR) 光谱来看，Ni(III) 配合物表现出可观察到的 T2，表明 Ni(III) 配合物是用作基于分子的自旋量子位的有希望的候选者。
Molecule‐based magnetic materials are promising candidates for molecular spin qubits, which utilize spin relaxation behavior. Various kinds of transition metal complexes withS=1/2 have been reported to act as spin qubits with long spin‐spin relaxation times (T2). However, the spin qubit properties of low‐spin Ni(III) complexes are not as well known since Ni(III) compounds are often unstable. We report here the slow magnetic relaxation behavior andT2values for three kinds of low‐spin Ni(III) based complexes withS=1/2 under magnetically diluted conditions. [Ni(cyclam)X2]Y (cyclam=1,4,8,11‐tetraazacyclotetradecane) with octahedral structures and [Ni(mnt)2]−(mnt=maleonitriledithiolate) with a square‐planar structure underwent slow magnetic relaxations in the presence of a dc magnetic bias field. From electron spin resonance (ESR) spectroscopy, the Ni(III) complexes exhibited observableT2, indicating that Ni(III) complexes are promising candidates for use as molecule‐based spin qubits.