scholarly journals Pentanuclear [2.2] spirocyclic lanthanide(iii) complexes: slow magnetic relaxation of the DyIII analogue

2015 ◽  
Vol 44 (44) ◽  
pp. 19282-19293 ◽  
Author(s):  
Sourav Biswas ◽  
Sourav Das ◽  
Jan van Leusen ◽  
Paul Kögerler ◽  
Vadapalli Chandrasekhar
Keyword(s):  
Magnetic Relaxation ◽  
Slow Relaxation ◽  
Magnetic Analysis ◽  
Slow Magnetic Relaxation

A series of [2.2] spirocyclic complexes [Ln5(LH)4(η1-Piv)(η2-Piv)3(μ2–η2 η1Piv)2(H2O)]·Cl (Ln = DyIII, TbIII and HoIII) were synthesized. Magnetic analysis reveals that the DyIII analogue showed slow relaxation of magnetization.

Slow relaxation of magnetization in unprecedented Cu–Ln-Rad hetero-tri-spin chains constructed from multidentate nitronyl nitroxide

2019 ◽  
Vol 7 (29) ◽  
pp. 9057-9064 ◽  
Author(s):  
Juan Sun ◽  
Zan Sun ◽  
Kang Wang ◽  
Lu Xi ◽  
Yue Ma ◽  
...  
Keyword(s):  
Magnetic Relaxation ◽  
Spin Chains ◽  
Slow Relaxation ◽  
Nitronyl Nitroxide ◽  
Nitronyl Nitroxides ◽  
Slow Magnetic Relaxation

Unprecedented Cu–Ln heterometallic chains derived from poly-dentate nitronyl nitroxides are reported. A Tb complex shows slow magnetic relaxation, while a Dy derivative displays interesting two-step relaxations of magnetization.

Magnetic field and dilution effects on the slow relaxation of {Er3} triangle-based arsenotungstate single-molecule magnets

2020 ◽  
Vol 49 (35) ◽  
pp. 12458-12465 ◽  
Author(s):  
Hanhan Chen ◽  
Lin Sun ◽  
Jinpeng Zhang ◽  
Zikang Xiao ◽  
Pengtao Ma ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Slow Relaxation ◽  
Relaxation Processes ◽  
Single Molecule Magnets ◽  
Thermally Activated ◽  
Slow Magnetic Relaxation ◽  
Dilution Effects

Triangular {Er3} cluster containing POM exhibits field-induced two thermally activated relaxation processes. Whereas, the diamagnetic dilution sample indicates slow magnetic relaxation with the QTM being partially suppressed.

scholarly journals Mixed metal CoII1−xZnIIx–organic frameworks based on chains with mixed carboxylate and azide bridges: magnetic coupling and slow relaxation

RSC Advances ◽  
2018 ◽  
Vol 8 (39) ◽  
pp. 22046-22052 ◽  
Author(s):  
Yan-Qin Wang ◽  
Kun Wang ◽  
En-Qing Gao
Keyword(s):  
Magnetic Relaxation ◽  
Magnetic Coupling ◽  
Slow Relaxation ◽  
Mixed Metal ◽  
Slow Magnetic Relaxation

A series of mixed-metal systems consisting of CoII1−xZnIIx chains with (μ-COO)2(μ-EO-N3) bridges were prepared, exhibiting interesting magnetic coupling and slow magnetic relaxation.

Slow magnetic relaxation in Dy2 and Dy4 complexes of a versatile, trifunctional polydentate N,O-ligand

2019 ◽  
Vol 48 (38) ◽  
pp. 14269-14278 ◽  
Author(s):  
Muhammad U. Anwar ◽  
Ahmed Al-Harrasi ◽  
Jeremy M. Rawson ◽  
Emma L. Gavey ◽  
Jeffery Regier ◽  
...  
Keyword(s):  
Magnetic Relaxation ◽  
Slow Relaxation ◽  
Zero Field ◽  
Slow Magnetic Relaxation

A binuclear DyIII complex exhibits slow relaxation of magnetization under an applied dc field, while its tetranuclear counterpart exhibits “true” zero-field SMM behaviour.

Structural and magnetic properties of some lanthanide (Ln = Eu(iii), Gd(iii) and Nd(iii)) cyanoacetate polymers: field-induced slow magnetic relaxation in the Gd and Nd substitutions

2014 ◽  
Vol 43 (32) ◽  
pp. 12342-12356 ◽  
Author(s):  
A. Arauzo ◽  
A. Lazarescu ◽  
S. Shova ◽  
E. Bartolomé ◽  
R. Cases ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Relaxation ◽  
Slow Relaxation ◽  
Slow Magnetic Relaxation ◽  
Structural And Magnetic Properties

The cyanoacetate complexes, {[Ln2(CNCH2COO)6(H2O)4]·2H2O}n, with Ln = Gd, Nd, show field-induced slow relaxation: resonant phonon trapping and Orbach process for Gd, and Orbach and direct processes for Nd.

Magnetic refrigeration and slow magnetic relaxation in tetranuclear lanthanide cages (Ln = Gd, Dy) with in situ ligand transformation

2014 ◽  
Vol 38 (7) ◽  
pp. 3006-3014 ◽  
Author(s):  
Javeed Ahmad Sheikh ◽  
Amit Adhikary ◽  
Sanjit Konar
Keyword(s):  
Magnetic Relaxation ◽  
Magnetic Refrigeration ◽  
Slow Relaxation ◽  
Magnetic Entropy ◽  
Magnetic Studies ◽  
Entropy Changes ◽  
Slow Magnetic Relaxation

Three tetranuclear lanthanide cages featuring either hemicubane (1 and 2) or distorted hemicubane (3) like cores are reported. Magnetic studies reveal significant magnetic entropy changes for complex 1 and a slow relaxation of magnetisation for 3.

scholarly journals Slow magnetic relaxation in a homo dinuclear Dy(iii) complex in a pentagonal bipyramidal geometry

2020 ◽  
Vol 49 (37) ◽  
pp. 13110-13122
Author(s):  
Joydev Acharya ◽  
Naushad Ahmed ◽  
Jessica Flores Gonzalez ◽  
Pawan Kumar ◽  
Olivier Cador ◽  
...  
Keyword(s):  
Magnetic Relaxation ◽  
Magnetic Analysis ◽  
Slow Magnetic Relaxation

A homodinuclear complex of Dy(iii) has been synthesised and characterised. Magnetic analysis disclosed a field-induced slow magnetic relaxation of the complex.

Dinuclear Lanthanide–Carboxylate Compounds: Field-Induced Slow Relaxation of Magnetization for Dysprosium(III) Analogue

2015 ◽  
Vol 68 (3) ◽  
pp. 488 ◽  
Author(s):  
Yi-Lei Li ◽  
Qing-Yan Liu ◽  
Cai-Ming Liu ◽  
Yu-Ling Wang ◽  
Ling Chen
Keyword(s):  
Energy Barrier ◽  
Magnetic Relaxation ◽  
Applied Field ◽  
Antiferromagnetic Interaction ◽  
Slow Relaxation ◽  
Phen Ligand ◽  
Exponential Factor ◽  
Coordination Environment ◽  
Carboxylate Groups ◽  
Slow Magnetic Relaxation

Three chiral dinuclear lanthanide compounds, Ln2(µ2-L)4(L)2(phen)2 (Ln = Dy (1), Gd (2), and Er (3); phen = 1,10-phenanthroline), have been synthesized using the (S)-(+)-2-(6-methoxy-2-naphthyl)propionic acid (HL) ligand. The two lanthanide centres in compound Ln2(µ2-L)4(L)2(phen)2 are bridged by four carboxylate groups to give a dinuclear Ln2(µ2-L)4 core. The square antiprismatic coordination environment for each lanthanide centre is further completed by a chelating carboxylate group from another L– ligand and two nitrogen atoms from the phen ligand. A weak antiferromagnetic interaction between the two GdIII ions is observed in compound 2. The Dy analogue displays field-induced slow magnetic relaxation behaviour with an effective energy barrier Ueff/k of 17.24(2) K and a pre-exponential factor τ0 of 2.7(1) × 10–6 s. However, no slow relaxation phenomenon was observed for the Er derivative even in the presence of 2 kOe applied field.

Field-induced slow magnetic relaxation of two 1-D compounds containing six-coordinated cobalt(ii) ions: influence of the coordination geometry

2018 ◽  
Vol 5 (9) ◽  
pp. 2314-2320 ◽  
Author(s):  
Zhiwei Chen ◽  
Lei Yin ◽  
Xiuna Mi ◽  
Suna Wang ◽  
Fan Cao ◽  
...  
Keyword(s):  
Coordination Sphere ◽  
Magnetic Relaxation ◽  
Slow Relaxation ◽  
Coordination Geometry ◽  
Slow Magnetic Relaxation ◽  
Relaxation Magnetization

Two 1-D Co(ii) compounds with different coordination geometries of the same coordination sphere exhibited field-induced slow relaxation magnetization with different D values.

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.

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