Magnetoelectric coupling in the paramagnetic state of a metal-organic framework

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	Magnetoelectric coupling in the paramagnetic state of a metal-organic framework
	Wang, W ; Yan, LQ ; Cong, JZ ; Zhao, YL ; Wang, F ; Shen, SP ; Zou, T ; Zhang, D ; Wang, SG ; Han, XF ; Sun, Y
刊名	SCIENTIFIC REPORTS
	2013
卷号	3
ISSN号	2045-2322
通讯作者	Sun, Y (reprint author), Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China.
中文摘要	Although the magnetoelectric effects - the mutual control of electric polarization by magnetic fields and magnetism by electric fields, have been intensively studied in a large number of inorganic compounds and heterostructures, they have been rarely observed in organic materials. Here we demonstrate magnetoelectric coupling in a metal-organic framework [(CH3)(2)NH2]Mn( HCOO)(3) which exhibits an order-disorder type of ferroelectricity below 185 K. The magnetic susceptibility starts to deviate from the Curie-Weiss law at the paraelectric-ferroelectric transition temperature, suggesting an enhancement of short-range magnetic correlation in the ferroelectric state. Electron spin resonance study further confirms that the magnetic state indeed changes following the ferroelectric phase transition. Inversely, the ferroelectric polarization can be improved by applying high magnetic fields. We interpret the magnetoelectric coupling in the paramagnetic state in the metal-organic framework as a consequence of the magnetoelastic effect that modifies both the superexchange interaction and the hydrogen bonding.
资助信息	National Key Basic Research Program of China [2011CB921801]; Natural Science Foundation of China [11074293, 51021061, 11274371]
语种	英语
公开日期	2014-01-16
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57196]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Wang, W,Yan, LQ,Cong, JZ,et al. Magnetoelectric coupling in the paramagnetic state of a metal-organic framework[J]. SCIENTIFIC REPORTS,2013,3.
APA	Wang, W.,Yan, LQ.,Cong, JZ.,Zhao, YL.,Wang, F.,...&Sun, Y.(2013).Magnetoelectric coupling in the paramagnetic state of a metal-organic framework.SCIENTIFIC REPORTS,3.
MLA	Wang, W,et al."Magnetoelectric coupling in the paramagnetic state of a metal-organic framework".SCIENTIFIC REPORTS 3(2013).