High frequency EPR on dilute solutions of the single molecule magnet Ni$_4$
| Autor: | de Loubens, G., Kent, A. D., Krymov, V., Gerfen, G. J ., Beedle, C. C., Hendrickson, D. N. |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | J. Appl. Phys. 103, 07B910 (2008) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/1.2834447 |
| Popis: | Dilute frozen solutions of the single molecule magnet Ni$_4$ (S=4) have been studied using high frequency D-band (130 GHz) EPR. Despite the random orientation of the molecules, well defined EPR absorption peaks are observed, due to the strong variation of the splittings between the different spin-states on magnetic field. Temperature dependent studies above 4 K and comparison with simulations enable identification of the spin transitions and determination of the Hamiltonian parameters. The latter are found to be close to those of Ni$_4$ single crystals. No echo was detected from Ni$_4$ in pulsed experiments, which sets an upper bound of about 50 ns on the spin coherence time. Comment: 4 pages, 3 figures, accepted for publication in Journal of Applied Physics (52nd MMM conference proceedings) |
| Databáze: | arXiv |
| Externí odkaz: |
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