scholarly journals Investigation of easy-plane magnetic anisotropy in P-ligand square-pyramidal CoII single ion magnets

2017 ◽  
Vol 53 (38) ◽  
pp. 5338-5341 ◽  
Author(s):  
Amit Kumar Mondal ◽  
Jesús Jover ◽  
Eliseo Ruiz ◽  
Sanjit Konar
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetic Relaxation ◽  
Easy Plane ◽  
Relaxation Behavior ◽  
Donor Ligand ◽  
Slow Magnetic Relaxation ◽  
First Time

Field induced slow magnetic relaxation behavior has been studied for the first time for two P-donor ligand-based square-pyramidal CoII complexes with an easy-plane magnetic anisotropy.

scholarly journals Slow magnetic relaxation in a {CoIICoIII2} complex containing a high magnetic anisotropy trigonal bipyramidal CoII centre

2018 ◽  
Vol 47 (28) ◽  
pp. 9237-9240 ◽  
Author(s):  
Alexandra Collet ◽  
Gavin A. Craig ◽  
María José Heras Ojea ◽  
Lakshmi Bhaskaran ◽  
Claire Wilson ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetic Relaxation ◽  
Easy Plane ◽  
Trigonal Bipyramidal ◽  
Slow Magnetic Relaxation

Incorporation of a trigonal bipyramidal CoII centre in {CoIICoIII2} leads to a large, easy-plane magnetic anisotropy and slow magnetic relaxation.

Structure, magnetic anisotropy and relaxation behavior of seven-coordinate Co(ii) single-ion magnets perturbed by counter-anions

2020 ◽  
Vol 49 (22) ◽  
pp. 7620-7627 ◽  
Author(s):  
Gangji Yi ◽  
Chunyang Zhang ◽  
Wen Zhao ◽  
Huihui Cui ◽  
Lei Chen ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetic Relaxation ◽  
Relaxation Behavior ◽  
Relaxation Processes ◽  
Coordination Unit ◽  
Slow Magnetic Relaxation

A series of mononuclear seven-coordinate complexes with the same coordination unit [Co(BPA-TPA)]2+ (BPA-TPA = pentapyidyldiamine) display the different slow magnetic relaxation processes perturbed by the variation of the counter anions.

scholarly journals Field Induced Single Ion Magnetic Behaviour in Square-Pyramidal Cobalt(II) Complexes with Easy-Plane Magnetic Anisotropy

2019 ◽  
Vol 5 (1) ◽  
pp. 12 ◽  
Author(s):  
Amit Mondal ◽  
Arpan Mondal ◽  
Sanjit Konar
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetic Relaxation ◽  
Magnetic Measurements ◽  
Chloride Ion ◽  
Magnetic Behaviour ◽  
Easy Plane ◽  
Ab Initio Theory ◽  
Slow Magnetic Relaxation ◽  
Experimental Values ◽  
Insight Into

Two penta-coordinate CoII complexes with formulae [Co(14-TMC)Cl](BF4) (1, 14-TMC = 1,4,8,11-Tetramethyl-1,4,8,11-tetraazacyclotetradecane) and [Co(12-TBC)Cl](ClO4)·(MeCN) (2, 12-TBC = 1,4,7,10-Tetrabenzyl-1,4,7,10-tetraazacyclododecane) were synthesized and characterized. Structural analysis revealed that ligand coordinates to the CoII centre in a tetradentate fashion and the fifth position is occupied by chloride ion and the geometries around CoII centres are best described as distorted square pyramidal. Detailed magnetic measurements disclose the presence of significant easy-plane magnetic anisotropy and field induced slow magnetic relaxation behaviours of the studied complexes. More insight into the magnetic anisotropy has been given using ab initio theory calculations, which agree well with the experimental values and further confirmed the easy-plane magnetic anisotropy.

scholarly journals Slow Magnetic Relaxation in a One-Dimensional Coordination Polymer Constructed from Hepta-Coordinate Cobalt(II) Nodes

2020 ◽  
Vol 6 (4) ◽  
pp. 45
Author(s):  
Amit Kumar Mondal ◽  
Arpan Mondal ◽  
Sanjit Konar
Keyword(s):  
Magnetic Susceptibility ◽  
Coordination Polymer ◽  
Magnetic Anisotropy ◽  
Ab Initio Calculations ◽  
Direct Current ◽  
Magnetic Relaxation ◽  
Relaxation Processes ◽  
Ac Magnetic Susceptibility ◽  
One Dimensional ◽  
Slow Magnetic Relaxation

A one-dimensional coordination polymer was synthesized employing hepta-coordinate CoII as nodes and dicyanamide as linkers. Detailed direct current (DC) and alternating current (AC) magnetic susceptibility measurements reveal the presence of field-induced slow magnetic relaxation behavior of the magnetically isolated seven-coordinate CoII center with an easy-plane magnetic anisotropy. Detailed ab initio calculations were performed to understand the magnetic relaxation processes. To our knowledge, the reported complex represents the first example of slow magnetic relaxation in a one-dimensional coordination polymer constructed from hepta-coordinate CoII nodes and dicyanamide linkers.

Phosphine Oxide Ligand Based Tetrahedral Co II Complexes with Field‐induced Slow Magnetic Relaxation Behavior Modified by Terminal Ligands

2019 ◽  
Vol 14 (9) ◽  
pp. 1467-1471 ◽  
Author(s):  
Rui‐Chong Yang ◽  
Dan‐Ru Wang ◽  
Jun‐Liang Liu ◽  
Yu‐Fei Wang ◽  
Wei‐Quan Lin ◽  
...  
Keyword(s):  
Phosphine Oxide ◽  
Magnetic Relaxation ◽  
Relaxation Behavior ◽  
Slow Magnetic Relaxation

The near-infrared luminescence and magnetism of dinuclear complexes with different local symmetries constructed from a β-diketonate co-ligand and bis-Schiff base ligand

2020 ◽  
Vol 44 (6) ◽  
pp. 2561-2570 ◽  
Author(s):  
Huan-Huan Chen ◽  
Dong-Fang Wu ◽  
Yao-Yao Duan ◽  
Ling Li ◽  
Yun-Juan Wang ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Magnetic Relaxation ◽  
Near Infrared ◽  
Relaxation Behavior ◽  
Dinuclear Complexes ◽  
Infrared Luminescence ◽  
Slow Magnetic Relaxation ◽  
Local Symmetries

A DyIII-complex based on a β-diketonate co-ligand and bi-Schiff base ligand displays slow magnetic relaxation behavior.

Two Lanthanide–nitronyl nitroxide radicals compounds with slow magnetic relaxation behavior

2015 ◽  
Vol 1081 ◽  
pp. 348-354 ◽  
Author(s):  
Chen-Xi Zhang ◽  
Xue-Mei Qiao ◽  
Yu-Kun Kong ◽  
Bingwu Wang ◽  
Yu-Ying Zhang ◽  
...  
Keyword(s):  
Magnetic Relaxation ◽  
Relaxation Behavior ◽  
Nitronyl Nitroxide ◽  
Nitroxide Radicals ◽  
Slow Magnetic Relaxation

Enantiopure chiral coordination polymers of tetrahedral and octahedral cobalt(ii) alternate chains exhibiting slow magnetic relaxation behavior

2011 ◽  
Vol 40 (21) ◽  
pp. 5680 ◽  
Author(s):  
Dong-Rong Xiao ◽  
Guang-Ju Zhang ◽  
Jun-Liang Liu ◽  
Lin-Lin Fan ◽  
Ruo Yuan ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Magnetic Relaxation ◽  
Relaxation Behavior ◽  
Slow Magnetic Relaxation
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