Field-induced single-ion magnet behaviour of a hexacoordinated Co(ii) complex with easy-axis-type magnetic anisotropy

被引：32
|
作者：
Tupolova, Yulia P. [1 ]
Shcherbakov, Igor N. [1 ]
Popov, Leonid D. [1 ]
Lebedev, Vladimir E. [1 ]
Tkachev, Valery V. [2 ]
Zakharov, Konstantin, V [3 ]
Vasiliev, Alexander N. [3 ,4 ,5 ]
Korchagin, Denis, V [2 ]
Palii, Andrei, V [2 ,6 ]
Aldoshin, Sergey M. [2 ]
机构：
[1] Southern Fed Univ, Dept Chem, 7 Zorge Str, Rostov Na Donu 344090, Russia
[2] Russian Acad Sci, Inst Problems Chem Phys, Chernogolovka, Moscow Region, Russia
[3] Moscow MV Lomonosov State Univ, Phys Fac, Moscow 119991, Russia
[4] Natl Univ Sci & Technol MISiS, Moscow 119049, Russia
[5] Natl Res South Ural State Univ, Chelyabinsk 454080, Russia
[6] Inst Appl Phys, 5 Acad Str, MD-2028 Kishinev, Moldova
来源：
DALTON TRANSACTIONS | 2019年 / 48卷 / 20期
关键词：
MONONUCLEAR COBALT(II) COMPLEX; TRANSITION-METAL-COMPLEXES; STATE PERTURBATION-THEORY; ZETA VALENCE QUALITY; GAUSSIAN-BASIS SETS; MOLECULE MAGNET; SLOW RELAXATION; ATOMS LI; IMPLEMENTATION; FORMULATION;
D O I：
10.1039/c9dt00770a
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A coordination compound with the composition [CoLCl2]H2O (L = bis-condensation product of diacetyl and 2-hydrazinyl-4,6-dimethylpyrimidine) was synthesized, in which the Co(ii) ion was hexacoordinated. Under applied DC fields, this compound exhibited single-ion magnet behavior. Two relaxation processes were observed when increasing the applied magnetic field from 1000 to 3200 Oe. The first relaxation (high-frequency) was observed both at 1000 Oe and 3200 Oe, while the second relaxation was only registered under a field of 3200 Oe at low frequencies (<1 Hz) and low temperatures (<5 K). Modeling of the magnetic DC properties using the Griffith Hamiltonian accompanied by quantum chemical calculations revealed easy-axis-type magnetic anisotropy with weak rhombic contributions.
引用
收藏
页码：6960 / 6970
页数：11
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