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Light- and Temperature-Assisted Spin State Annealing: Accessing the Hidden Multistability

preprint
submitted on 22.11.2019, 12:03 and posted on 29.11.2019, 17:47 by Yan-Cong Chen, Yan Meng, Jiří Tuček, Yan-Jie Dong, Xiao-Wei Song, Guo-Zhang Huang, Chuan-Lei Zhang, Zhao-Ping Ni, Radek Zbořil, Ming-Liang Tong
Among the responsive multistable materials, spin crossover (SCO) systems are of particular interest for stabilizing multiple spin states with various stimulus inputs and physical outputs. Here in a 2D Hofmann-type coordination polymer [Fe(isoq)2{Au(CN)2}2] (isoq = isoquinoline), hidden multistability of the spin state is accessed by introducing an medium-temperature annealing after a light/temperature stimulation. With the combined effort of magnetic, crystallographic and Mössbauer spectral investigation, these distinct spin states are identified and the light- and temperature-assisted transition pathways are clarified. Such excitation-relaxation and trapping-relaxation joint mechanisms, as ingenious interplays between the kinetic and thermodynamic effects, uncover hidden possibilities for the discovery of multistable materials and the development of multistate intelligent devices.

History

Email Address of Submitting Author

chyanc@qq.com

Institution

Sun Yat-Sen University

Country

China

ORCID For Submitting Author

0000-0001-5047-3445

Declaration of Conflict of Interest

The authors declare no conflict of interest.

Version Notes

v.20190922

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