Magnetism of a novel tetranuclear nickel(II) cluster in strong magnetic fields
| Autor: | Michel Goiran, Vladislav Kataev, A. Alfonsov, Hans-Henning Klauss, C. Golze, C. Mennerich, H. Rakoto, Serhiy Demeshko, Bernd Büchner, Guido Leibeling, Franc Meyer, J.M. Broto, Rüdiger Klingeler |
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| Rok vydání: | 2006 |
| Předmět: |
History
Spin states Spin polarization Chemistry Magnetism 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences 3. Good health Computer Science Applications Education law.invention Magnetization law Excited state 0103 physical sciences Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Atomic physics 010306 general physics 0210 nano-technology Electron paramagnetic resonance Ground state |
| Zdroj: | Journal of Physics: Conference Series. 51:351-354 |
| ISSN: | 1742-6596 1742-6588 |
| DOI: | 10.1088/1742-6596/51/1/082 |
| Popis: | High frequency Electron Spin Resonance (ESR) up to ν = 1 THz and magnetization M(B) of a tetranuclear-Ni(II) single molecular complex of type [L2Ni4(N3)(O2CAda)4](ClO4) featuring an unprecedented central μ4 - 1,1,3,3 azide have been studied in magnetic fields up to B = 55T. Bridging ligands provide intramolecular exchange paths of different strength between the four Ni ions each having a spin SNi = 1. T- and ν-dependent ESR measurements enable to accurately determine the energy spectrum of the spin states of the cluster as a function of B. A predominantly antiferromagnetic character of exchange renders the ground state nonmagnetic, S = 0, with a number of excited magnetic multiplet states, S = 1,. . . ,4. Remarkably, ESR gives evidence for the spin-level crossing in a field of ~ 25T which turns the ground state of the cluster to a strongly magnetic one. This observation is confirmed by the static M(B) data. |
| Databáze: | OpenAIRE |
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