Synthesis and characterisation of Vanadium(III) fluorides α-BaVF5 and BaV(F,OH)5 with an S = 1 spin chain structure

IF 3.2 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Journal of Solid State Chemistry Pub Date : 2024-11-08 DOI:10.1016/j.jssc.2024.125095

Qingqing Huang , Xiedong Cheng , Feifan Li , Yaping Li , Rui Cui , Minfeng Lü

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Abstract

Two new vanadium(III) fluorides, α-BaVF₅ and BaV(F,OH)_5, were hydrothermally synthesised. The crystal structures of both α-BaVF₅ and BaV(F,OH)₅ contain chain structures consisting of corner-sharing V^IIIF₆ or V^III(F,OH)₆ octahedra. A monomeric cis-chain structure is found in α-BaVF_5, in contrast to the helical-chain structure in BaV(F,OH)_5. Although predominantly antiferromagnetic interactions are present in these tilted compounds at high temperatures, the strength of the exchange interaction is greater in α-BaVF₅ due to the high Curie−Weiss temperature of θ_CW = −66.0(1)K. Furthermore, magnetic measurements revealed that α-BaVF₅ exhibits a canted antiferromagnetic ground state, while BaV(F,OH)₅ displays antiferromagnetic behaviour at low temperatures.

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具有 S = 1 自旋链结构的氟化钒（III）α-BaVF5 和 BaV(F,OH)5 的合成与表征

通过水热法合成了两种新的氟化钒（III）：α-BaVF5 和 BaV(F,OH)5。α-BaVF5和BaV(F,OH)5的晶体结构都包含由分角VIIIF6或VIII(F,OH)6八面体组成的链结构。虽然这些倾斜化合物在高温下主要存在反铁磁相互作用，但由于 α-BaVF5 的居里-魏斯温度高达 θCW = -66.0(1)K，因此交换相互作用的强度更大。此外，磁性测量结果表明，α-BaVF5 表现出一种倾斜的反铁磁基态，而 BaV(F,OH)5 则在低温下表现出反铁磁性。

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来源期刊

Journal of Solid State Chemistry 化学-无机化学与核化学

CiteScore

6.00

自引率

9.10%

发文量

848

审稿时长

25 days

期刊介绍： Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.