Switching the anisotropy barrier of a single-ion magnet by symmetry change from quasi-D-5h to quasi-O-h

Jun-Liang Liu , Yan-Cong Chen , Yan-Cong Zheng , Yan-Zhen Zheng , Wei-Quan Lin , Liviu Ungur (1) , Wolfgang Wernsdorfer (2) , Liviu F. Chibotaru (1) , Ming-Liang Tong

1 Division of Quantum and Chemistry
2 NEEL - QuantECA - Circuits électroniques quantiques Alpes

A reversible single-crystal-to-single-crystal transformation is used to dramatically change the relaxation behavior of a single-ion magnet. The coordination geometry of the Dy-III site of a [Zn-Dy-Zn] complex changes from pentagonal-bipyramid (quasi-D-5h) to octahedron (quasi-O-h), inducing an energy barrier change from 305 cm(-1) (439 K) to a negligible value, respectively. Ab initio calculations reveal that the ideal D-5h-Dy-III is of perfect axiality with a substantial energy barrier in accordance with the experimental result.

Domaines: Physique [physics]

Jun-Liang Liu, Yan-Cong Chen, Yan-Cong Zheng, Yan-Zhen Zheng, Wei-Quan Lin, et al.. Switching the anisotropy barrier of a single-ion magnet by symmetry change from quasi-D-5h to quasi-O-h. Chemical Science, 2013, 4 (8), pp.3310-3316. ⟨10.1039/C3SC50843A⟩. ⟨hal-00975241⟩