Three tetracoordinate Co(ii) complexes [Co(biq)X2] (X = Cl, Br, I) with easy-plane magnetic anisotropy as field-induced single-molecule magnets

Three mononuclear complexes [CoII(biq)X2] (biq = 2,2′-biquinoline; X = Cl, Br, I) possess a sizable magnetic anisotropy, and they display a superparamagnetic behaviour in an applied external field that culminates between BDC = 0.2–0.3 T.

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The localized electron: magnetic properties

10.1093/oso/9780198814597.003.0002 ◽

2018 ◽

Author(s):

Jean-Pierre Launay ◽

Michel Verdaguer

Keyword(s):

Single Molecule ◽

Model Systems ◽

Ferromagnetic Coupling ◽

Single Chain ◽

Single Molecule Magnets ◽

Magnetic Systems ◽

Orbital Interactions ◽

Prussian Blue Analogues ◽

Mononuclear Complexes

After preliminaries about electron properties, and definitions in magnetism, one treats the magnetism of mononuclear complexes, in particular spin cross-over, showing the role of cooperativity and the sensitivity to external perturbations. Orbital interactions and exchange interaction are explained in binuclear model systems, using orbital overlap and orthogonality concepts to explain antiferromagnetic or ferromagnetic coupling. The phenomenologically useful Spin Hamiltonian is defined. The concepts are then applied to extended molecular magnetic systems, leading to molecular magnetic materials of various dimensionalities exhibiting bulk ferro- or ferrimagnetism. An illustration is provided by Prussian Blue analogues. Magnetic anisotropy is introduced. It is shown that in some cases, a slow relaxation of magnetization arises and gives rise to appealing single-ion magnets, single-molecule magnets or single-chain magnets, a route to store information at the molecular level.

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Magnetic anisotropy on demand exploiting high-pressure as remote control: an ab initio proof-of-concept

Dalton Transactions ◽

10.1039/d1dt01719e ◽

2021 ◽

Author(s):

Matteo Briganti ◽

Federico Totti

Keyword(s):

High Pressure ◽

High Temperature ◽

Remote Control ◽

Magnetic Anisotropy ◽

Ab Initio ◽

Single Molecule ◽

Boiling Temperature ◽

Proof Of Concept ◽

Single Molecule Magnets ◽

On Demand

Lanthanide based single molecule magnets have recently become very promising systems for creating single molecule device working at high temperature (nitrogen boiling temperature). However, the variation of direction of the...

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Observing magnetic anisotropy in electronic transport through individual single-molecule magnets

Journal of Physics Condensed Matter ◽

10.1088/0953-8984/27/11/113202 ◽

2015 ◽

Vol 27 (11) ◽

pp. 113202 ◽

Cited By ~ 14

Author(s):

E Burzurí ◽

R Gaudenzi ◽

H S J van der Zant

Keyword(s):

Magnetic Anisotropy ◽

Single Molecule ◽

Electronic Transport ◽

Single Molecule Magnets

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Enhanced energy barriers triggered by magnetic anisotropy modulation via tuning the functional groups on the bridging ligands in Dy2 single-molecule magnets

Dalton Transactions ◽

10.1039/c8dt03506g ◽

2018 ◽

Vol 47 (42) ◽

pp. 15197-15205 ◽

Cited By ~ 15

Author(s):

Yaru Qin ◽

Yu Jing ◽

Yu Ge ◽

Wei Liu ◽

Yahong Li ◽

...

Keyword(s):

Magnetic Anisotropy ◽

Functional Groups ◽

Single Molecule ◽

Energy Barrier ◽

Energy Barriers ◽

Single Molecule Magnets ◽

Bridging Ligands

Two dinuclear dysprosium complexes of 1 and 2 have been synthesized and both of them exhibit SMM behavior. The energy barrier is enhanced ca. 35 K by elaborately tuning the backbones of the ligands.

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