Abstract
We report the synthesis, structure, and magnetic properties of a new dinuclear dysprosium(III) complex based on a 3-methoxycinnamate ligand. The centrosymmetric complex exhibits a field-induced SMM behavior. In contrast to the previously reported lanthanide-based systems with cinnamate derivatives that relax through a combination of Raman and direct processes, an Orbach process is also involved in highlighting the role of the structural organization over the spin-lattice relaxations.
Highlights
Slow relaxation of the magnetization in isolated lanthanide-based complexes and coordination polymers have been extensively studied since the discovery of a Single Molecule Magnets (SMM)behavior in mononuclear bis(phatlocyaninato) lanthanide complexes by Ishikawa and coll [1].Such molecule-based compounds are often viewed as potential candidates for spintronics or high-density storage applications [2,3,4,5] since an important anisotropic barrier, ∆, may induce the appearance of a magnetic bistability
We have reported several examples of discrete and extended architectures based on an association of lanthanide ions (Ce3+, Nd3+, Gd3+, Dy3+ ) with two different derivatives of cinnamic acid (2-methoxycinnamic and 3-methoxycinnamic acids) [30]
We report in this article the synthesis, structure and magnetic properties of a new dinuclear Dy3+ complex incorporating the 3-methoxycinnamate ligand
Summary
Behavior in mononuclear bis(phatlocyaninato) lanthanide complexes by Ishikawa and coll [1] Such molecule-based compounds are often viewed as potential candidates for spintronics or high-density storage applications [2,3,4,5] since an important anisotropic barrier, ∆, may induce the appearance of a magnetic bistability. The mechanism of the magnetic relaxation that allows for the flipping of the magnetization may have a complex origin and may proceed via the Quantum Tunneling of the Magnetization (QTM) and spin-phonon (lattice vibrations). The former depends on various parameters including deviation from high symmetry, dipolar interactions, hyperfine coupling, or Inorganics 2018, 6, 35; doi:10.3390/inorganics6010035 www.mdpi.com/journal/inorganics
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