普鲁士蓝类似物K0.4Co1.3[Fe（CN）6]•nH2O的热致结构畸变和电荷转移

IF 1.4 4区材料科学 Q3 CRYSTALLOGRAPHY

Phase Transitions Pub Date : 2022-08-08 DOI:10.1080/01411594.2022.2110098

Zeyi Lu, Guo-qi Hu, Jiyu Shen, Renjie Zhang, Qinghang Zhang, Haiwen Chen, Yanfang Xia, Min Liu

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引用次数: 1

摘要

摘要本文采用共沉淀法在室温、40、60、80和100℃下合成了普鲁士蓝类似物K0.4Co1.3[Fe（CN）6]•nH2O（[CCoFe]） °C。XRD表明，随着制备温度的升高，[KCoFe]发生结构畸变。室温相和高温相都是面心立方（Fm-3 m）晶格常数分别为10.230Å和9.980Å的结构。穆斯堡尔谱分析表明，由于合成温度的升高，[KCoFe]发生了电荷转移诱导的自旋跃迁。顺磁性结构的一部分：铁（，S = 1/2）–CN–Co（，S = 3/2）转化为反磁性结构：Fe（，S = 0）–CN–Co（，S = 0）。这项工作为设计新的普鲁士蓝类似物磁性材料提供了新的思路。关键词：热诱导，普鲁士蓝类似物，结构畸变，电荷转移。

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Thermal-induced structural distortion and charge transfer of Prussian blue analogues K0.4Co1.3[Fe(CN)6] • nH2O

Abstract In this paper, the Prussian blue analogues K0.4Co1.3[Fe(CN)6]•nH2O ([KCoFe]) were synthesized using the coprecipitation method at room temperature, 40, 60, 80 and 100 °C. XRD shows that as the preparation temperature increases, [KCoFe] undergoes structural distortion. The room temperature phase and the high temperature phase are both face-centered cubic (Fm-3 m) structures with lattice constants of 10.230 Å and 9.980 Å, respectively. Mössbauer spectrum analysis showed that due to the increase of synthesis temperature, [KCoFe] has undergone charge transfer induced spin transition. Part of paramagnetic structure: FeІІІ ( , S = 1/2)–CN–CoІІ ( , S = 3/2) was transformed into diamagnetic structure: FeІІ ( , S = 0)–CN–CoІІІ ( , S = 0). This work provides new ideas for designing new Prussian blue analogues magnetic materials. Keyword: Thermal-induced, Prussian blue analogues, Structural distortion, Charge transfer.

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来源期刊

Phase Transitions 物理-晶体学

CiteScore

3.00

自引率

6.20%

发文量

审稿时长

1.4 months

期刊介绍： Phase Transitions is the only journal devoted exclusively to this important subject. It provides a focus for papers on most aspects of phase transitions in condensed matter. Although emphasis is placed primarily on experimental work, theoretical papers are welcome if they have some bearing on experimental results. The areas of interest include: -structural phase transitions (ferroelectric, ferroelastic, multiferroic, order-disorder, Jahn-Teller, etc.) under a range of external parameters (temperature, pressure, strain, electric/magnetic fields, etc.) -geophysical phase transitions -metal-insulator phase transitions -superconducting and superfluid transitions -magnetic phase transitions -critical phenomena and physical properties at phase transitions -liquid crystals -technological applications of phase transitions -quantum phase transitions Phase Transitions publishes both research papers and invited articles devoted to special topics. Major review papers are particularly welcome. A further emphasis of the journal is the publication of a selected number of small workshops, which are at the forefront of their field.