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Slow magneticrelaxation in aeuropium(II) complex Dylan ErrulatKatie L. M. HarrimanDiogo A. Gálico2024 год

Slow magnetic relaxation in a europium(II) complex
статья из журнала

Полный текстСтраница публикацииПубликация в OpenAlex
Аннотация: Abstract Single-ion anisotropy is vital for the observation of Single-Molecule Magnet (SMM) properties (i.e., a slow dynamics of the magnetization) in lanthanide-based systems. In the case of europium, the occurrence of this phenomenon has been inhibited by the spin and orbital quantum numbers that give way to J = 0 in the trivalent state and the half-filled population of the 4f orbitals in the divalent state. Herein, by optimizing the local crystal field of a quasi-linear bis(silylamido) Eu II complex, the [Eu II (N{SiMePh 2 } 2 ) 2 ] SMM is described, providing an example of a europium complex exhibiting slow relaxation of its magnetization. This behavior is dominated by a thermally activated (Orbach-like) mechanism, with an effective energy barrier of approximately 8 K, determined by bulk magnetometry and electron paramagnetic resonance. Ab initio calculations confirm second-order spin-orbit coupling effects lead to non-negligible axial magnetic anisotropy, splitting the ground state multiplet into four Kramers doublets, thereby allowing for the observation of an Orbach-like relaxation at low temperatures.
Год издания: 2024
Авторы: Dylan Errulat, Katie L. M. Harriman, Diogo A. Gálico, Elvin V. Salerno, Johan van Tol, Akseli Mansikkamäki, Mathieu Rouzières, Stephen Hill, Rodolphe Clérac, Muralee Murugesu
Издательство: Nature Portfolio
Источник: Nature Communications
Ключевые слова: Lanthanide and Transition Metal Complexes, Magnetism in coordination complexes, Electron Spin Resonance Studies
Другие ссылки: Nature Communications (PDF)
Nature Communications (HTML)
OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (PDF)
OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (HTML)
hal.science (HTML)
PubMed Central (HTML)
PubMed (HTML)