一个奇拉的普鲁士蓝色模拟推进磁性-奇拉二元论的极限
Matteo Atzori1, Ivan Breslavetz1, Kévin Paillot1
1Laboratoire National des Champs Magnétiques Intenses (LNCMI) , Univ. Grenoble Alpes, INSA Toulouse, Univ. Toulouse Paul Sabatier, EMFL, CNRS, Grenoble F-38042 , France.
Journal of the American Chemical Society
|December 5, 2019
概括
在使用可见光的奇拉普鲁士蓝模拟器中观察到磁性奇拉二重化 (MChD). 这种MChD效应完全取决于配置,并且与38K以下的材料磁化强烈相关.
科学领域:
- 材料科学
- 磁化学
- 光谱学
背景情况:
- 具有磁性特性的奇拉材料对先进的光学和电子应用具有兴趣.
- 普鲁士蓝色类似物 (PBA) 是多功能协调化合物,具有可调节的磁性和光学特性.
- 磁性化 (MChD) 是一种对磁性排序和物质性都敏感的现象.
研究的目的:
- 在使用可见光的奇拉普鲁士蓝模拟器 (PBA) 中研究磁性 - 奇拉二重化 (MChD).
- 将MChD信号与材料的磁性排序和结构相关联.
- 探索PBA在磁光应用中的潜力.
主要方法:
- 单晶增长的化PBA:[MnII (X) -pnH (H) ][CrIII (CN) ]·H2O.
- 用X射线衍射和磁性测量来确定结构,绝对配置和磁性排序温度 (38K).
- 从室温到4K的可见光范围 (450900nm) 的吸收和MChD光谱.
主要成果:
- 嵌合式PBA具有2D层结构和低于38K的铁磁顺序.
- 在4K的电子光谱显示了CrIII和MnII中心的贡献,以及金属对金属的电荷传输频段.
- 在磁性订单温度以下观察到强烈的,绝对依赖于配置的MChD信号,紧随材料磁化.
结论:
- 奇拉PBA显示出显著的MChD效应,最强的信号在0.46T时达到2.6%T-1.
- 观察到的MChD强烈依赖于材料的绝对配置和磁性状态.
- 这项研究突显了合PBA作为先进磁光器件的有前途材料的潜力.
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