Influence of pressure on a dysprosocenium single-molecule magnet.

Influence of pressure on a dysprosocenium single-molecule magnet.
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DOI:
10.1039/d2cc06722f
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发表时间:
2023-02-28
影响因子:
4.9
通讯作者:
Overgaard, Jacob
Overgaard, Jacob
中科院分区:
化学2区
文献类型:
--
作者:
Parmar, Vijay S. S.;Thiel, Andreas M. M.;Nabi, Rizwan;Gransbury, Gemma K. K.;Norre, Marie S. S.;Evans, Peter;Corner, Sophie C. C.;Skelton, Jonathan M. M.;Chilton, Nicholas F. F.;Mills, David P. P.;Overgaard, Jacob

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结合 X 射线衍射、磁力测量和理论计算,研究了外部压力对高性能镝单分子磁体的影响。有效能垒 (Ueff) 从约降低。环境压力下 1300 cm−1 至约 1300 cm−1 3 GPa 时为 1125 cm−1。我们的结果表明,压缩 < 1.2 GPa 对奥尔巴赫过程的影响可以忽略不计,但磁弛豫 > 1 GPa 通过拉曼弛豫和/或磁化的量子隧道效应增加。分析了高压对镝阳离子结构和磁性的影响。结合周期性计算,获得结构变形与磁弛豫特性之间的相关性。
The effects of external pressure on a high-performing dysprosocenium single-molecule magnet are investigated using a combination of X-ray diffraction, magnetometry and theoretical calculations. The effective energy barrier (Ueff) decreases from ca. 1300 cm−1 at ambient pressure to ca. 1125 cm−1 at 3 GPa. Our results indicate that compression < 1.2 GPa has a negligible effect on the Orbach process, but magnetic relaxation > 1 GPa increases via Raman relaxation and/or quantum tunnelling of magnetisation. The effects of high-pressure on the structural and magnetic properties of the dysprosocenium cation are analyzed. Combined with periodic calculations, correlations between structural deformations and magnetic relaxation characteristics are obtained.
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