Bilayer Mott System with Cation路路路Anion Supramolecular Interactions Based on a Nickel Dithiolene Anion Radical: Coexistence of Ferro- and Antiferromagnetic Anion Layers and Large Negative Magnetoresis

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• 作者：Tetsuro Kusamoto ; Hiroshi M. Yamamoto ; Naoya Tajima ; Yugo Oshima ; Satoshi Yamashita ; Reizo Kato
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：May 6, 2013
• 年：2013
• 卷：52
• 期：9
• 页码：4759-4761
• 全文大小：199K
• 年卷期：v.52,no.9(May 6, 2013)
• ISSN：1520-510X

文摘

A novel bilayer Mott system, (Et-4BrT)[Ni(dmit)₂]₂ (Et-4BrT = ethyl-4-bromothiazolium; dmit = 1,3-dithiole-2-thione-4,5-dithiolate), contains two nonequivalent Ni(dmit)₂ anion layers, where both layers form Mott insulating states. Supramolecular Br_cation路路路S_anion and S_cation路路路S_anion interactions play a crucial role in constructing the bilayer structure. The ferro- and antiferromagnetic short-range-ordering layers coexist in the crystal, which achieves large negative magnetoresistance (螖蟻/蟻₀ 鈮?鈭?5% at 70 kOe) at 5 K under 1 GPa.