Slow Magnetic Relaxation in Weak Easy-Plane Anisotropy: the Case of a Combined Magnetic and HFEPR Study

Yuan-Yuan Zhu; Fang Liu; Jia-Jia Liu; Yin-Shan Meng; Shang-Da Jiang; Anne-Laure Barra; Wolfgang Wernsdorfer; Song Gao

doi:10.1021/acs.inorgchem.6b01972

Slow Magnetic Relaxation in Weak Easy-Plane Anisotropy: the Case of a Combined Magnetic and HFEPR Study

Inorg Chem. 2017 Jan 17;56(2):697-700. doi: 10.1021/acs.inorgchem.6b01972. Epub 2016 Dec 22.

Authors

Yuan-Yuan Zhu¹, Fang Liu¹, Jia-Jia Liu², Yin-Shan Meng², Shang-Da Jiang², Anne-Laure Barra³, Wolfgang Wernsdorfer⁴, Song Gao²

Affiliations

¹ School of Chemistry and Chemical Engineering, Hefei University of Technology and Key Laboratory of Advanced Functional Materials and Devices , Hefei 230009, Anhui Province, China.
² Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China.
³ LNCMI-CNRS , 25 rue des Martyrs BP 166, 38042 Grenoble Cedex 9, France.
⁴ Institut Néel, CNRS & Université Grenoble Alpes , BP 166, 25 avenue des Martyrs, 38042 Grenoble Cedex 9, France.

PMID: 28004926
DOI: 10.1021/acs.inorgchem.6b01972

Abstract

Two pseudotetrahedral cobalt(II) complexes exhibiting slow magnetic relaxation under an applied direct-current field are investigated. The weak easy-plane anisotropy is accurately determined by high-field/high-frequency electron paramagnetic resonance spectroscopy as D = 2.57 cm^-1 and E = 0.82 cm^-1 for 1 and D = 5.56 cm^-1 and E = 1.05 cm^-1 for 2. In addition, hysteresis loops are observed for the two compounds at very low temperatures.