隔离良好的Dy3+离子之间的相互作用大大有助于单核乙酸乙酸酸复合物的去磁化
Andrey V Gavrikov1, Andrey B Ilyukhin1, Mikhail E Buzoverov1
1Kurnakov Institute of General and Inorganic Chemistry RAS, Leninskii prosp., 31, Moscow, Russia. penguin1990@yandex.ru.
Dalton transactions (Cambridge, England : 2003)
|May 29, 2025
概括
新的双 (Dy) 复合物显示缓慢的磁性放松,作为单分子磁铁 (SMM). 综合体1展示了有效的零场放松和在最佳直流场下增强的性能,突出了先进磁性材料的潜力.
科学领域:
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
- 磁力学 磁力学 是一种
背景情况:
- 具有β-二基酸盐和碳酸盐连接体的八协调四基酸盐复合体是罕见的.
- 兰化物复合物对于开发单分子磁铁 (SMM) 是至关重要的.
研究的目的:
- 为了合成和表征新的单核方形抗 prismatic lanthanide 复合物.
- 研究这些新型复合体的磁性和SMM行为.
- 探索连接体环境和Dy-Dy相互作用对SMM性能的影响.
主要方法:
- 合成的[Ln(acac) 2 (PyrCOO)
- 测量磁感应度的测量.
- 最初的计算来验证放松路径.
- 对零场和直流场依赖磁场属性的分析.
主要成果:
- 综合体1,3,和5呈现缓慢的磁放松.
- 复合体1显示零场放松, Δeff/kB = 149 K,在1500 Oe下增强到265 K.
- 磁化量子道化 (QTM) 在复合体1中影响零场放松.
- 综合体1是一种高效的基于Dy的零场SMM,在相关综合体中,在最佳场下具有最高的Δeff/kB.
- 显著的Dy-Dy相互作用影响SMM性能,尽管有很大的空间隔离.
结论:
- 合成的复合物代表了几乎未被研究的八个协调的四基酸盐系统的新例子.
- 综合体1显示出出色的SMM特性,特别是在应用直流电场下.
- 连接体设计和磁相互作用是优化兰化物复合体中SMM行为的关键因素.
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