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Strategies toward High-Temperature Lanthanide-Based Single-Molecule Magnets

Ungur, Liviu and Chibotaru, Liviu F (2016) In Inorganic Chemistry 55(20). p.10043-10056
Abstract

Lanthanide-based single-molecule magnets are leading materials for achieving magnetization blocking at the level of one molecule. In this paper, we examine the physical requirements for efficient magnetization blocking in single-ion complexes and identify the design principles for achieving very high magnetization blocking barriers in lanthanide-based compounds. The key condition is the preponderant covalent binding of the Ln ion to one of the ligand atoms, tremendously enhancing the axial crystal field. We also make an overview of practical schemes for the implementation of this principle. These are (1) the effective lowering of the coordination number via displacement of the Ln ion to one of the atoms in the coordination polyhedron,... (More)

Lanthanide-based single-molecule magnets are leading materials for achieving magnetization blocking at the level of one molecule. In this paper, we examine the physical requirements for efficient magnetization blocking in single-ion complexes and identify the design principles for achieving very high magnetization blocking barriers in lanthanide-based compounds. The key condition is the preponderant covalent binding of the Ln ion to one of the ligand atoms, tremendously enhancing the axial crystal field. We also make an overview of practical schemes for the implementation of this principle. These are (1) the effective lowering of the coordination number via displacement of the Ln ion to one of the atoms in the coordination polyhedron, (2) the design of two-coordinated complexes, and (3) the stabilization of diatomic compounds in cages and on surfaces. The last proposal is appealing in connection to spintronics applications, especially via the exploration of robust and highly anisotropic [LnX] units displaying multilevel blocking barriers of thousands of Kelvin and prospects for room-temperature magnetization blocking.

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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Inorganic Chemistry
volume
55
issue
20
pages
14 pages
publisher
The American Chemical Society
external identifiers
  • scopus:84991794136
ISSN
0020-1669
DOI
10.1021/acs.inorgchem.6b01353
language
English
LU publication?
no
id
e7041021-556f-4b1e-ae09-35ef5f97662c
date added to LUP
2017-04-07 11:43:59
date last changed
2017-11-19 04:39:07
@article{e7041021-556f-4b1e-ae09-35ef5f97662c,
  abstract     = {<p>Lanthanide-based single-molecule magnets are leading materials for achieving magnetization blocking at the level of one molecule. In this paper, we examine the physical requirements for efficient magnetization blocking in single-ion complexes and identify the design principles for achieving very high magnetization blocking barriers in lanthanide-based compounds. The key condition is the preponderant covalent binding of the Ln ion to one of the ligand atoms, tremendously enhancing the axial crystal field. We also make an overview of practical schemes for the implementation of this principle. These are (1) the effective lowering of the coordination number via displacement of the Ln ion to one of the atoms in the coordination polyhedron, (2) the design of two-coordinated complexes, and (3) the stabilization of diatomic compounds in cages and on surfaces. The last proposal is appealing in connection to spintronics applications, especially via the exploration of robust and highly anisotropic [LnX] units displaying multilevel blocking barriers of thousands of Kelvin and prospects for room-temperature magnetization blocking.</p>},
  author       = {Ungur, Liviu and Chibotaru, Liviu F},
  issn         = {0020-1669},
  language     = {eng},
  month        = {10},
  number       = {20},
  pages        = {10043--10056},
  publisher    = {The American Chemical Society},
  series       = {Inorganic Chemistry},
  title        = {Strategies toward High-Temperature Lanthanide-Based Single-Molecule Magnets},
  url          = {http://dx.doi.org/10.1021/acs.inorgchem.6b01353},
  volume       = {55},
  year         = {2016},
}