Above-Room-Temperature Magnetodielectric Coupling in a Possible Molecule-Based Multiferroic: Triethylmethylammonium Tetrabromoferrate(III)

Above-Room-Temperature Magnetodielectric Coupling in a Possible Molecule-Based Multiferroic: Triethylmethylammonium Tetrabromoferrate(III)
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可能的基于分子的多铁性化合物中的室温以上磁介电耦合:四溴铁酸三乙基甲基铵 (III)

DOI:
10.1021/ja3073319
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发表时间:
2012-11-14
影响因子:
15
通讯作者:
Xiong, Ren-Gen
Xiong, Ren-Gen
中科院分区:
化学1区
文献类型:
--
作者:
Cai, Hong-Ling;Zhang, Yi;Xiong, Ren-Gen

文献摘要

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发现了一种可能的室温以上分子多铁性化合物,四溴铁酸三乙基甲基铵(III)(1)。其铁电和磁相变发生在几乎相同的温度(类似于360 K),导致强磁介电(MD)耦合,在0.6 MHz的MD比为18%。有趣的是,1也经历了低温铁电-铁电相变,Aizu符号为6 mmF 6,并且在171 K下具有小的磁性和介电异常。
A possible above-room-temperature molecular multiferroic, triethylmethylammonium tetrabromoferrate(III) (1), has been discovered. Its ferroelectric and magnetic phase transitions take place at almost the same temperature (similar to 360 K), resulting in strong magnetodielectric (MD) coupling, with a MD ratio of 18% at 0.6 MHz. Interestingly, 1 also undergoes a low temperature ferroelectric-ferroelectric phase transition with an Aizu notation of 6mmF6 and small magnetic and dielectric anomalies at 171 K.