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Magnetic Relaxation Dynamics of a Binuclear Diluted Er(III)/Y(III) Compound Influenced by Lattice Solvent
Author(s) -
Ge JingYuan,
Qiu YaRu,
Wang HaiYing,
Su Jian,
Wang Peng,
Chen Zhongyan
Publication year - 2020
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202000655
Subject(s) - solvent , lattice (music) , relaxation (psychology) , chemistry , magnetic relaxation , spin–lattice relaxation , condensed matter physics , materials science , nuclear magnetic resonance , chemical physics , organic chemistry , physics , magnetic field , magnetization , psychology , paramagnetism , social psychology , quantum mechanics , acoustics
It is crucial to investigate the slow relaxation mechanisms of binuclear Er III ‐based single‐molecule magnets (SMMs) and explore strategies for optimizing their magnetic properties. Herein, a doped compound, [Y 1.75 Er 0.25 (thd) 4 Pc] ⋅ 2C 6 H 6 ( YEr ⋅ 2C 6 H 6 , Hthd=2,2,6,6‐tetramethylheptanedione, H 2 Pc=phthalocyanine), was synthesized by doping the paramagnetic erbium(III) compound Er 2 ⋅ 2C 6 H 6 in the diamagnetic yttrium(III) matrix Y 2 ⋅ 2C 6 H 6 . The doping effect was studied using SQUID magnetization measurements. The results suggest that magnetic‐site dilution improves the magnetic property from a fast relaxation of the pure Er III compound to a typical SMM relaxation process of the doped sample. In this binuclear system, the dominant single‐ion relaxation is entangled with the neighboring Er III ion through the intramolecular Er III ⋅⋅⋅Er III interaction, which plays an important role in suppressing the quantum tunneling of the magnetization (QTM) process. Furthermore, the influence of lattice solvents on single‐ion relaxation was studied. By releasing the benzene molecules, compound YEr ⋅ 2C 6 H 6 can be successfully transformed to a desolvated sample YEr accompanied by structural alteration and improved SMM performance.