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arXiv 2402.17399cond-mat.mtrl-sci
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新型三元氟化物 AgIICoIIIF5:合成、结构与磁学特性

Novel Ternary AgIICoIIIF5 Fluoride: Synthesis, Structure and Magnetic Characteristics

Daniel Jezierski, Zoran Mazej, Wojciech Grochala

AI总结:

本文报道了在F2过压下合成的新型三元氟化物AgIICoIIIF5,确定其单斜晶系结构,发现其为带隙在可见光范围的电荷转移绝缘体,并具有-62 meV的超交换常数及128 K下的磁有序转变。

摘要:

我们报道了银钴氟化物体系中的一种新化合物,其包含顺磁银 (d9) 和高自旋钴 (d6),通过固态法在 F2 过压下的高压釜中合成。基于粉末 X 射线衍射,我们确定 AgIICoIIIF5 结晶为单斜晶系,空间群为 C2/c。计算得出的基本带隙处于电磁波谱的可见光范围内,且该化合物具有电荷转移绝缘体的特性。AgCoF5 是一种亚铁磁体,在混合自旋阳离子 (Ag...Co) 之间具有一个占主导的超交换磁相互作用常数,为 -62 meV (SCAN 结果)。对粉末样品进行的磁测量识别出在 128 K 处的转变,这可能表明存在磁有序。

英文摘要:

We present a new compound in the silver cobalt fluoride system, featuring paramagnetic silver (d9) and high-spin cobalt (d6), synthesized by solid state method in an autoclave under F2 overpressure. Based on powder X ray diffraction, we determined that AgIICoIIIF5 crystallizes in a monoclinic system with space group C2/c. The calculated fundamental band gap falls in the visible range of the electromagnetic spectrum, and the compound has the character of charge-transfer insulator. AgCoF5 is a ferrimagnet with one predominant superexchange magnetic interaction constant between mixed spin cations (Ag ... Co) of minus 62 meV (SCAN result). Magnetometric measurements conducted on a powdered sample allowed the identification of a transition at 128 K, which could indicate magnetic ordering.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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