Magnetic layered perovskites of [CH3C(NH2)(2)](2)-[ M(HCOO)(4)] (M = Co2+ and Ni2+): synthesis, structures and properties

doi:10.1039/c8dt01729h

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	Magnetic layered perovskites of [CH3C(NH2)(2)](2)-[ M(HCOO)(4)] (M = Co2+ and Ni2+): synthesis, structures and properties
	Liu, Shu; Wang, Bing-Wu; Wang, Zhe-Ming; Gao, Song
刊名	DALTON TRANSACTIONS
	2018-09-14
卷号	47 期号:34 页码:11925-11933
ISSN号	1477-9226
DOI	10.1039/c8dt01729h
英文摘要	We present two layered perovskites of the formula [CH3C(NH2)(2)](2)[M(HCOO)(4)] (M = Co and Ni). The two materials are isostructural and crystallize in the orthorhombic space group Pccn. The structures consist of anionic < 100 >-oriented perovskite or square metal-formate layers and interlayer [CH3C(NH2)(2)]+ cations. In each layer octahedral M2+ ions are linked by equatorial anti-anti HCOO- bridges and are further coordinated by apical monodentate HCOO-groups. The interlayer acetamidinium cations form N-H center dot center dot center dot O H-bonds with the anionic layers to support the 3D structure. As the directions of most vibrations of the interlayer atoms are approximately along the a-axis, the two materials exhibit nearly zero thermal expansion (a few (MK)(-1)) along the b-direction perpendicularly to the layers and positive thermal expansion along the a-(similar to 40 (MK)(-1)) and c-(similar to 20 (MK)(-1)) axes parallel to the layers. They are both weak ferromagnets, and the Neel temperatures are 6.0 K and 17.0 K for M = Co and Ni, respectively. The Co compound exhibited high spontaneous magnetization of 444 cm(3) G mol(-1) under a field of 10 Oe and an unusually low coercive field of 38 Oe at 2 K. IR spectroscopic, thermal and dielectric properties were investigated.
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000443172000022
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/42263]
专题	中国科学院化学研究所
通讯作者	Wang, Zhe-Ming; Gao, Song
作者单位	Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Rare Earth Mat Chem & Applicat, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Liu, Shu,Wang, Bing-Wu,Wang, Zhe-Ming,et al. Magnetic layered perovskites of [CH3C(NH2)(2)](2)-[ M(HCOO)(4)] (M = Co2+ and Ni2+): synthesis, structures and properties[J]. DALTON TRANSACTIONS,2018,47(34):11925-11933.
APA	Liu, Shu,Wang, Bing-Wu,Wang, Zhe-Ming,&Gao, Song.(2018).Magnetic layered perovskites of [CH3C(NH2)(2)](2)-[ M(HCOO)(4)] (M = Co2+ and Ni2+): synthesis, structures and properties.DALTON TRANSACTIONS,47(34),11925-11933.
MLA	Liu, Shu,et al."Magnetic layered perovskites of [CH3C(NH2)(2)](2)-[ M(HCOO)(4)] (M = Co2+ and Ni2+): synthesis, structures and properties".DALTON TRANSACTIONS 47.34(2018):11925-11933.