Dielectric Tunability, Expanding the Function of Metal-Organic Frameworks

被引：4
|
作者：
Guo, Jiang-Bin [1 ,2 ]
Chen, Li-Hong [1 ,2 ]
Ke, Hao [1 ,2 ]
Wang, Xuan [1 ,2 ]
Zhao, Hai-Xia [1 ,2 ]
Long, La-Sheng [1 ,2 ]
Zheng, Lan-Sun [1 ,2 ]
机构：
[1] Xiamen Univ, Collaborat Innovat Ctr Chem Energy Mat, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
[2] Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China
来源：
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS | 2018年 / 12卷 / 06期
基金：
中国国家自然科学基金;
关键词：
dielectric tunability; electron hopping; metal-organic frameworks; MOFs; FERROELECTRICITY; BA0.6SR0.4TIO3; LA2NIMNO6; CERAMICS;
D O I：
10.1002/pssr.201700425
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Above room-temperature dielectric tunability is observed in the metal-organic frameworks (MOFs) [NH2(CH3)(2)](n)[(FeFeII)-Fe-III(HCOO)(6)](n) (1) and [NH2(CH3)(2)](n)[(FeFe(1-x)NixII)-Fe-III-Ni-II(HCOO)(6)](n) (x=0.64-0.69) (2). The relative tunability (defined as [E-(0) - E-(E)]/E((0))x100%=E/E((0))x100%) values for 1 are up to 35% (at 410K) for E perpendicular to c and 21% (at 380K) for E||c, while these for 2 are 14% for E perpendicular to c and 11.5% for E||c. Investigation on the mechanism of the dielectric tunability in 1 and 2 reveals that the activation energy for the electron hopping between two adjacent metal ions and the magnetic exchange interaction play a key role in the dielectric tunability of these materials.
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页数：4
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