1. Slow magnetic relaxation in a {EuCu5} metallacrown.
- Author
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Wang, Jin, Ruan, Ze-Yu, Li, Quan-Wen, Chen, Yan-Cong, Huang, Guo-Zhang, Liu, Jun-Liang, Reta, Daniel, Chilton, Nicholas F., Wang, Zhen-Xing, and Tong, Ming-Liang
- Subjects
MAGNETIC relaxation ,RARE earth metals ,X-ray diffraction - Abstract
A 3d–4f heterometallic metallacrown with formula of [EuCu
5 (quinha)5 (sal)2 (py)5 ]CF3 SO3 ·py·3H2 O (1) (H2 quinha = quinaldichydroxamic acid; Hsal = salicylaldehyde) has been synthesized. This complex shows field-induced slow magnetic relaxation via a Raman-like process, where studies of the isostructural {LuCu5 } (2) and {YCu5 } (3) complexes show that the slow dynamics mainly arise from the {Cu5 } S = 1/2 ground state rather than the EuIII ion. However, the EuIII ion enhances the relaxation rates of the {Cu5 } unit which likely arises from second-order effects in the formally diamagnetic7 F0 ground state of EuIII . [ABSTRACT FROM AUTHOR]- Published
- 2019
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