Ultrahard magnetism from mixed-valence dilanthanide complexes with metal-metal bonding

Magnetic effects of lanthanide bonding Lanthanide coordination compounds have attracted attention for their persistent magnetic properties near liquid nitrogen temperature, well above alternative molecular magnets. Gould et al . report that introducing metal-metal bonding can enhance coercivity. Reduction of iodide-bridged terbium or dysprosium dimers resulted in a single electron bond between the metals, which enforced alignment of the other valence electrons. The resultant coercive fields exceeded 14 tesla below 50 and 60 kelvin for the terbium and dysprosium compounds, respectively. —JSY

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Mixed-valence molecular magnets based on building block: Structures, magnetic properties and DFT analyses

Polyhedron ◽

10.1016/j.poly.2006.09.028 ◽

2007 ◽

Vol 26 (9-11) ◽

pp. 1781-1786 ◽

Cited By ~ 5

Author(s):

Y.C. Chen ◽

G.X. Liu ◽

P.F. Wang ◽

H. Xu ◽

X.M. Ren ◽

...

Keyword(s):

Magnetic Properties ◽

Building Block ◽

Mixed Valence ◽

Molecular Magnets ◽

Block Structures

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Magnetic properties measurement and discussion of an amorphous power transformer core at room and liquid nitrogen temperature

Journal of Physics Conference Series ◽

10.1088/1742-6596/507/3/032018 ◽

2014 ◽

Vol 507 (3) ◽

pp. 032018

Author(s):

A G Pronto ◽

A Maurício ◽

J M Pina

Keyword(s):

Magnetic Properties ◽

Liquid Nitrogen ◽

Power Transformer ◽

Liquid Nitrogen Temperature ◽

Transformer Core

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Magnetic Properties of Cyano-Bridged Compound Co [Fe(CN)5NO]·5H2O

Materials Science Forum ◽

10.4028/www.scientific.net/msf.789.415 ◽

2014 ◽

Vol 789 ◽

pp. 415-418

Author(s):

Cheng Long Lei ◽

Qing Lin ◽

Hai Fu Huang ◽

Yun He ◽

Rui Jun Wang

Keyword(s):

Magnetic Properties ◽

Binuclear Complex ◽

Room Temperature ◽

Magnetic Measurements ◽

Magnetic Phase ◽

Ferromagnetic Material ◽

Molecular Magnets ◽

Molecular Fragments ◽

Shift Parameter ◽

Valence Electrons

The cyano-bridged complex Co [Fe (CN)5NO]·5H2O has been synthesized. According to the reaction of cyanide-based unsaturated ligand precursor (molecular fragments)[BLy(CN)x]n-with the metal ions or complex unsaturated ligand, it is easy to control the structure of molecular magnets and tune up the magnetic properties. Hetero binuclear complex Co [Fe (CN)5NO]∙5H2O was prepared through [Fe (CN)5NO]2- ion. The room temperature Mossbauer spectrum revealed a doublet with the isomer shift parameter (-0.44(7) mm/s) and quadrupole splitting (QS = 1.91(3) mm / s) characteristic for low-spin Fe (III) ions. The low-spin (S = 1/2) of the Fe (III) ion of valence electrons on the electric field gradient (EFG) was caused by non-zero contribution. DC and AC magnetic measurements showed that the complexes belonged to the anti-ferromagnetic material, with a magnetic phase transition temperature below 2K.

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Novel Structures and Magnetic Properties of Two [Mn2] Complexes with 2,4-di-2-pyridyl-2,4-pentanediol as the Ligand

Magnetochemistry ◽

10.3390/magnetochemistry5030043 ◽

2019 ◽

Vol 5 (3) ◽

pp. 43

Author(s):

En-Che Yang ◽

Yu-Ying Chang ◽

Shi-Yi Huang ◽

Ling-Xuan Hong ◽

Gene-Hsiang Lee ◽

...

Keyword(s):

Magnetic Properties ◽

Magnetic Property ◽

The Other ◽

Antiferromagnetic Coupling ◽

Monoclinic Space Group ◽

Ferromagnetic Coupling ◽

Manganese Ions ◽

Space Group ◽

Metal Metal ◽

Novel Structures

Two ligands, 2,4-di-2-pyridyl-2,4-pentanediol (rD and mD), were employed to synthesize two Mn2 complexes, [Mn2(rD)2Br2] (1) and [Mn2(mD)2(H2O)2]Br2 (2). Compound 1 crystallized in a tetragonal space group, P41212, with a novel hamburger shaped structure. A detailed study indicated that compound 1 did not contain a metal–metal bond, but antiferromagnetic coupling was observed between the Mn(III) ions. Compound 2 crystallized in a monoclinic space group, C2/c, with one Mn(II) and the other with Mn(IV). The two manganese ions were bridged by two alkoxide ligands, resulting in ferromagnetic coupling. Magnetic property studies confirm the above assignments.

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