Slow magnetic relaxation in a pseudotetrahedral cobalt(ii) complex with easy-plane anisotropy

2012 ◽  
Vol 48 (33) ◽  
pp. 3927 ◽  
Author(s):  
Joseph M. Zadrozny ◽  
Junjie Liu ◽  
Nicholas A. Piro ◽  
Christopher J. Chang ◽  
Stephen Hill ◽  
...  
Keyword(s):  
Magnetic Relaxation ◽  
Easy Plane ◽  
Plane Anisotropy ◽  
Slow Magnetic Relaxation

Syntheses, crystal structures and magnetic properties of two mixed-valence Co(iii)Co(ii) compounds derived from Schiff base ligands: field-supported single-ion-magnet behavior with easy-plane anisotropy

2017 ◽  
Vol 46 (38) ◽  
pp. 13135-13144 ◽  
Author(s):  
Shuvankar Mandal ◽  
Suraj Mondal ◽  
Cyril Rajnák ◽  
Ján Titiš ◽  
Roman Boča ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Schiff Base ◽  
Crystal Structures ◽  
Magnetic Relaxation ◽  
Mixed Valence ◽  
Easy Plane ◽  
Schiff Base Ligands ◽  
Plane Anisotropy ◽  
Amino Phenol ◽  
Slow Magnetic Relaxation

Positive D values and slow magnetic relaxation with two relaxation channels have been observed in two CoIIICoII compounds derived from imino-amino-phenol ligands.

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

2016 ◽  
Vol 56 (2) ◽  
pp. 697-700 ◽  
Author(s):  
Yuan-Yuan Zhu ◽  
Fang Liu ◽  
Jia-Jia Liu ◽  
Yin-Shan Meng ◽  
Shang-Da Jiang ◽  
...  
Keyword(s):  
Magnetic Relaxation ◽  
Easy Plane ◽  
Plane Anisotropy ◽  
Slow Magnetic Relaxation

Field-Supported Slow Magnetic Relaxation in Hexacoordinate CoIIComplexes with Easy Plane Anisotropy

2017 ◽  
Vol 2017 (11) ◽  
pp. 1520-1525 ◽  
Author(s):  
Cyril Rajnák ◽  
Ján Titiš ◽  
Ján Moncoľ ◽  
Franz Renz ◽  
Roman Boča
Keyword(s):  
Magnetic Relaxation ◽  
Easy Plane ◽  
Plane Anisotropy ◽  
Slow Magnetic Relaxation

Slow magnetic relaxation in cobalt N-heterocyclic carbene complexes

2020 ◽  
Vol 49 (33) ◽  
pp. 11577-11582
Author(s):  
Mohamed R. Saber ◽  
Jacob A. Przyojski ◽  
Zachary J. Tonzetich ◽  
Kim R. Dunbar
Keyword(s):  
Magnetic Properties ◽  
Theoretical Investigation ◽  
Magnetic Relaxation ◽  
Easy Axis ◽  
Easy Plane ◽  
Carbene Complexes ◽  
Plane Anisotropy ◽  
Slow Magnetic Relaxation

The combined experimental and theoretical investigation of the magnetic properties of [Co(CH2SiMe3)2(IPr)] (1), [CoCl2(IMes)2] (2) revealed a large easy plane anisotropy for 1 and a moderate easy axis anisotropy for 2.

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.

scholarly journals A Series of Field-Induced Single-Ion Magnets Based on the Seven-Coordinate Co(II) Complexes with the Pentadentate (N3O2) H2dapsc Ligand

2019 ◽  
Vol 5 (4) ◽  
pp. 58 ◽  
Author(s):  
Kopotkov ◽  
Korchagin ◽  
Sasnovskaya ◽  
Gilmutdinov ◽  
Yagubskii
Keyword(s):  
Magnetic Field ◽  
Ab Initio ◽  
Static Magnetic Field ◽  
Magnetic Relaxation ◽  
Theoretical Description ◽  
Easy Plane ◽  
Magnetic Data ◽  
Slow Magnetic Relaxation

A series of five new mononuclear pentagonal bipyramidal Co(II) complexes with the equatorial 2,6-diacetylpyridine bis(semicarbazone) ligand (H2dapsc) and various axial pseudohalide ligands (SCN, SeCN, N(CN)2, C(CN)3, and N3) was prepared and structurally characterizated: [Co(H2dapsc)(SCN)2]∙0.5C2H5OH (1), [Co(H2dapsc)(SeCN)2]∙0.5C2H5OH (2), [Co(H2dapsc)(N(CN)2)2]∙2H2O (3), [Co(H2dapsc)(C(CN)3)(H2O)](NO3)∙1.16H2O (4), and {[Co(H2dapsc)(H2O)(N3)][Co(H2dapsc)(N3)2]}N3∙4H2O (5). The combined analyses of the experimental DС and AC magnetic data of the complexes (1–5) and two other earlier described those of this family [Co(H2dapsc)(H2O)2)](NO3)2∙2H2O (6) and [Co(H2dapsc)(Cl)(H2O)]Cl∙2H2O (7), their theoretical description and the ab initio CASSCF/NEVPT2 calculations reveal large easy-plane magnetic anisotropies for all complexes (D = + 35 − 40 cm‒1). All complexes under consideration demonstrate slow magnetic relaxation with dominant Raman and direct spin–phonon processes at static magnetic field and so they belong to the class of field-induced single-ion magnets (SIMs).

Slow magnetic relaxation in mononuclear seven-coordinate cobalt(ii) complexes with easy plane anisotropy

2015 ◽  
Vol 44 (25) ◽  
pp. 11482-11490 ◽  
Author(s):  
Lei Chen ◽  
Shu-Yang Chen ◽  
Yi-Chen Sun ◽  
Yu-Mei Guo ◽  
Lu Yu ◽  
...  
Keyword(s):  
Magnetic Relaxation ◽  
Slow Relaxation ◽  
Positive Zero ◽  
Pentagonal Bipyramid ◽  
Zero Field ◽  
Relaxation Behaviour ◽  
Zero Field Splitting ◽  
Field Splitting ◽  
Plane Anisotropy ◽  
Slow Magnetic Relaxation

Two mononuclear pentagonal bipyramid cobalt(ii) complexes with positive zero-field splitting D values were demonstrated to exhibit field-induced slow relaxation behaviour.

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 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.

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