Effect of Axial Ligands on Easy‐Axis Anisotropy and Field‐Induced Slow Magnetic Relaxation in Heptacoordinated Fe II Complexes

2020 ◽  
Vol 26 (21) ◽  
pp. 4780-4789 ◽  
Author(s):  
Arpan Mondal ◽  
Shu‐Qi Wu ◽  
Osamu Sato ◽  
Sanjit Konar
Keyword(s):  
Magnetic Relaxation ◽  
Easy Axis ◽  
Axial Ligands ◽  
Slow Magnetic Relaxation

scholarly journals Slow Magnetic Relaxation in Distorted Tetrahedral Dy(III) Aryloxide Complexes

2021 ◽  
Author(s):  
Vijay Parmar ◽  
Gemma Kate Gransbury ◽  
George F. S. Whitehead ◽  
David P Mills ◽  
Richard E. P. Winpenny
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetic Relaxation ◽  
Easy Axis ◽  
Slow Magnetic Relaxation

Three distorted tetrahedral Dy(III) aryloxide complexes, [Na(THF)6][Dy(OArAd2tBu)2Cl2] (1) (OArAd2tBu = OC6H2Adamantyl2-2,6-tBu-4) and [Na(THF)6][Dy(OMes*)3X] (X = Cl, 2; BH4, 3), (OMes* = OC6H2tBu3-2,4,6) exhibit easy axis magnetic anisotropy and slow magnetic...

Two field-induced slow magnetic relaxation processes in a mononuclear Co(ii) complex with a distorted octahedral geometry

2016 ◽  
Vol 45 (22) ◽  
pp. 9279-9284 ◽  
Author(s):  
Jing Li ◽  
Yuan Han ◽  
Fan Cao ◽  
Rong-Min Wei ◽  
Yi-Quan Zhang ◽  
...  
Keyword(s):  
Single Molecule ◽  
Magnetic Relaxation ◽  
Easy Axis ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Relaxation Processes ◽  
Single Molecule Magnet ◽  
Distorted Octahedral ◽  
Slow Magnetic Relaxation

An easy-axis distorted octahedral mononuclear Co(ii) single-molecule magnet showing two filed-induced slow magnetic relaxation processes.

One-dimensional cobalt(ii) coordination polymer featuring single-ion-magnet-type field-induced slow magnetic relaxation

2018 ◽  
Vol 42 (12) ◽  
pp. 9612-9619 ◽  
Author(s):  
Xiangyu Liu ◽  
Xiufang Ma ◽  
Peipei Cen ◽  
Fengqing An ◽  
Zheng Wang ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Energy Barrier ◽  
Magnetic Relaxation ◽  
Easy Axis ◽  
One Dimensional ◽  
Slow Magnetic Relaxation

Single-ion-magnet-type field-induced double magnetic relaxation was observed in a one-dimensional cobalt(ii) coordination polymer which shows easy-axis anisotropy with D = −33.9 cm−1 and an energy barrier of Ueff = 38.8 K.

Slow magnetic relaxation in penta-coordinate cobalt(ii) field-induced single-ion magnets (SIMs) with easy-axis magnetic anisotropy

2020 ◽  
Vol 49 (33) ◽  
pp. 11715-11726 ◽  
Author(s):  
Salah S. Massoud ◽  
Zoe E. Perez ◽  
Jessica R. Courson ◽  
Roland C. Fischer ◽  
Franz A. Mautner ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetic Relaxation ◽  
Easy Axis ◽  
Slow Relaxation ◽  
Slow Magnetic Relaxation

Two penta-coordinate [Co(Ln)(NCS)]ClO4 with substituted pyridyl based bispyrazolyl ligands have been structurally characterized. The complexes show an easy-axis magnetic anisotropy, large rhombicity and slow relaxation of magnetization.

A mononuclear Co(ii) complex formed from pyridinedimethanol with manifold slow relaxation channels

2017 ◽  
Vol 46 (33) ◽  
pp. 10950-10956 ◽  
Author(s):  
Dušan Valigura ◽  
Cyril Rajnák ◽  
Ján Moncol ◽  
Ján Titiš ◽  
Roman Boča
Keyword(s):  
Magnetic Anisotropy ◽  
Coordination Sphere ◽  
Magnetic Relaxation ◽  
Easy Axis ◽  
Slow Relaxation ◽  
Slow Magnetic Relaxation

A mononuclear hexacoordinate complex [Co(pydm)2](dnbz)2 formed from 2,6-pyridinedimethanol in the coordination sphere of Co(ii) and dinitrobenzoato anions exhibits magnetic anisotropy of an easy axis type and a field induced slow magnetic relaxation.

Zero-Field Slow Magnetic Relaxation and Hysteresis Loop in Four-Coordinate CoII Single-Ion Magnets with Strong Easy-Axis Anisotropy

2019 ◽  
Vol 58 (19) ◽  
pp. 12555-12564 ◽  
Author(s):  
Hui-Hui Cui ◽  
Fang Lu ◽  
Xue-Tai Chen ◽  
Yi-Quan Zhang ◽  
Wei Tong ◽  
...  
Keyword(s):  
Hysteresis Loop ◽  
Magnetic Relaxation ◽  
Easy Axis ◽  
Zero Field ◽  
Slow Magnetic Relaxation

scholarly journals Correlation between Slow Magnetic Relaxations and Molecular Structures of Dy(III) Complexes with N5O4 Nona-Coordination

2019 ◽  
Vol 5 (2) ◽  
pp. 27 ◽  
Author(s):  
Kaede Kobayashi ◽  
Yukina Harada ◽  
Kazuki Ikenaga ◽  
Yasutaka Kitagawa ◽  
Masayoshi Nakano ◽  
...  
Keyword(s):  
Magnetic Relaxation ◽  
Bias Field ◽  
Molecular Structures ◽  
Donor Ligands ◽  
Relaxation Phenomena ◽  
Zero Bias ◽  
Donor Ligand ◽  
Axial Ligands ◽  
Mononuclear Complexes ◽  
Slow Magnetic Relaxation

A series of Dy(III) mononuclear complexes [DyA2L]+ (L denotes Schiff base N5 ligand that occupies equatorial positions and A− denotes bidentate anionic O-donor ligands such as NO3− (1), AcO− (2), and acac− (3)) were synthesized to investigate the correlation between the slow magnetic relaxation phenomena and the coordination structures around Dy(III). The Dy(III) ion in each complex is in a nona-coordination with the anionic O-donor ligand occupying up- and down-side positions of the N5 equatorial plane. 2 and 3 show slow magnetic relaxation phenomena under a zero bias-field condition, and all complexes showed slow magnetic relaxation under the applied 1000-Oe bias-field conditions. Arrhenius analyses revealed that the ΔE/kB, the barrier height for magnetization flipping, increases in this order, with the values of 24.1(6), 85(3), and 140(15) K. The effects of the exchanging axial ligands on the magnetic anisotropy were discussed together with the DFT calculations.

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.

Correlating the axial Zero Field Splitting with the slow magnetic relaxation in GdIII SIMs

2021 ◽  
Author(s):  
Júlia Mayans ◽  
Albert Escuer
Keyword(s):  
Magnetic Relaxation ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting ◽  
Slow Magnetic Relaxation

A possible relation between the value of the axial Zero Field Splitting and the occurrence of field-induced slow magnetic relaxation has been established for a new gadolinium(iii) compound.

Slow magnetic relaxation in dinuclear dysprosium and holmium phenoxide bridged complexes: a Dy2 single molecule magnet with a high energy barrier

2021 ◽  
Author(s):  
Matilde Fondo ◽  
Julio Corredoira-Vázquez ◽  
Ana M. Garcia-Deibe ◽  
Jesus Sanmartin Matalobos ◽  
Silvia Gómez-Coca ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Relaxation ◽  
High Energy ◽  
Single Molecule Magnet ◽  
High Energy Barrier ◽  
Slow Magnetic Relaxation

Dinuclear [M(H3L1,2,4)]2 (M = Dy, Dy2; M = Ho, Ho2) complexes were isolated from an heptadentate aminophenol ligand. The crystal structures of Dy2·2THF, and the pyridine adducts Dy2·2Py and Ho2·2Py,...

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