Large Easy-Plane Magnetic Anisotropy in a Three-Coordinate Cobalt(II) Complex [Li(THF)4 ][Co(NPh2 )3 ]

Yi-Fei Deng; Zhenxing Wang; Zhong-Wen Ouyang; Bing Yin; Zhiping Zheng; Yan-Zhen Zheng

doi:10.1002/chem.201603238

Large Easy-Plane Magnetic Anisotropy in a Three-Coordinate Cobalt(II) Complex [Li(THF)₄ ][Co(NPh₂ )₃ ]

Chemistry. 2016 Oct 10;22(42):14821-14825. doi: 10.1002/chem.201603238. Epub 2016 Sep 9.

Authors

Yi-Fei Deng¹, Zhenxing Wang², Zhong-Wen Ouyang³, Bing Yin⁴, Zhiping Zheng⁵, Yan-Zhen Zheng⁶

Affiliations

¹ Frontier Institute of Science and Technology (FIST), State Key Laboratory for Mechanical Behavior of Materials and MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an, 710054, P.R. China.
² Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, 430074, P.R. China. zxwang@hust.edu.cn.
³ Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, 430074, P.R. China.
⁴ MOE Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, P.R. China. rayinyin@nwu.edu.cn.
⁵ Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona, 85721, USA.
⁶ Frontier Institute of Science and Technology (FIST), State Key Laboratory for Mechanical Behavior of Materials and MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an, 710054, P.R. China. zheng.yanzhen@xjtu.edu.cn.

PMID: 27519123
DOI: 10.1002/chem.201603238

Abstract

Magnetic anisotropy is the key element in the construction of single-ion magnets, a kind of nanomagnets for high-density information storage. This works describes an unusual large easy-plane magnetic anisotropy (with a zero-field splitting parameter D of +40.2 cm^-1 ), mainly arising from the second-order spin-orbit coupling effect in a trigonal-planar Co^II complex [Li(THF)₄ ][Co(NPh₂ )₃ ], revealed by combined studies of magnetism, high frequency/field electron paramagnetic resonance spectroscopy, and ab initio calculations. Meanwhile, the field-induced slow magnetic relaxation in this complex was mainly attributed to the Raman process.

Keywords: ab initio calculations; cobalt(II); easy-plane magnetic anisotropy; high frequency electron paramagnetic resonance; slow magnetic relaxation.