Slow Magnetic Relaxation in Dysprosium Based Single-Ion Magnets

Autor: Preuss, K., Clerac, R., Reu, O., Ostrovsky, S., Palii, A., Klokishner, S.
Přispěvatelé: University of Guelph Department of Chemistry, Guelph, Ontario, Canada, Department of Chemistry, University of Guelph-University of Guelph, Centre de recherches Paul Pascal (CRPP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institute of Applied Physics, Academy of Sciences of Moldova, Institute of Applied Physics [Moldavie], STCU (project 5929) and the Supreme Council for Science and Technological Development of the Republic of Moldova (project15.817.02.06F), V. Sontea and I. Tiginyanu
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: 3rd International Conference on Nanotechnologies and Biomedical Engineering
3rd International Conference on Nanotechnologies and Biomedical Engineering, Singapore. 55, Springer Science+Business Media, pp. 134-137, 2016, ⟨10.1007/978-981-287-736-9_32⟩
DOI: 10.1007/978-981-287-736-9_32⟩
Popis: International audience; The experimental and theoretical study of two mononuclear dysprosium-based complexes is reported. Both complexes demonstrate slow relaxation of magnetization at low temperatures. The Hamiltonian for explanation of the magnetic behavior (the magnetic susceptibility as a function of temperature and magnetization as a function of the applied magnetic field) includes the crystal field of the nearest ligands of the dysprosium ion and the interaction with the external magnetic field. The crystal field parameters are evaluated in the framework of the exchange charge model, taking account for covalence effects. The proposed model provides a good agreement between the observed and calculated magnetic behavior. It is demonstrated that the low-lying energy levels for both studied complexes form the energy barriers for magnetization reversal that agrees with the observed single-ion magnetic behavior.
Databáze: OpenAIRE
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