Simultaneous Modulation of Magnetic and Dielectric Transition via Spin-Crossover-Tuned Spin Arrangement and Charge Distribution.
Simultaneous Modulation of Magnetic and Dielectric Transition via Spin-Crossover-Tuned Spin Arrangement and Charge Distribution.
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DOI：
10.1002/anie.201802774
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发表时间：
2018-06
影响因子：
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通讯作者：
Hui Zheng;Yinshan Meng;Guangli Zhou;C. Duan;O. Sato;S. Hayami;Yi Luo;Tao Liu
中科院分区：
文献类型：
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作者：
Hui Zheng;Yinshan Meng;Guangli Zhou;C. Duan;O. Sato;S. Hayami;Yi Luo;Tao Liu
磁性和介电性质通过外部刺激同时调谐，具有快速灵敏的响应，这对于通过电容测量监测磁性状态至关重要。在本文中，带正电荷的Fe II离子通过带负电荷的[（Tp）Fe III（CN）3]-（Tp =氢化三（吡唑基）硼酸酯）单元连接以形成中性链。自旋交叉（SCO）的Fe II网站可以敏感地触发通过热处理，光照射，和压力。SCO切换的自旋状态的Fe II离子和反铁磁相互作用之间的Fe III和Fe II离子，导致磁化强度的显着变化。此外，SCO诱导带负电荷的[（Tp）FeIII（CN）3]-单元的旋转，由于电荷分布的几何变化而产生介电异常。这项工作提供了一个合理的方式来操纵磁和介电性能的同时变化，利用SCO作为致动器，以调整自旋排列，磁耦合，和电荷分布。
Magnetic and dielectric properties have been tuned simultaneously by external stimuli with rapid and sensitive response, which is crucial to monitor the magnetic state via capacitive measurement. Herein, positive charged FeII ions were linked via negative charged [(Tp)FeIII (CN)3 ]- (Tp=hydrotris(pyrazolyl)borate) units to form a neutral chain. The spin-crossover (SCO) on FeII sites could be sensitively triggered via thermal treatment, light irradiation, and pressure. SCO switched the spin state of the FeII ions and antiferromagnetic interactions between FeIII and FeII ions, resulting in significant change in magnetization. Moreover, SCO induced rotation of negative charged [(Tp)FeIII (CN)3 ]- units, generating dielectric anomaly due to geometric change of charges distribution. This work provides a rational way to manipulate simultaneous variations in magnetic and dielectric properties utilizing SCO as an actuator to tune spin arrangement, magnetic coupling, and charge distribution.