Persistent Spin Dynamics in the $S=1/2$ V$_{15}$ Molecular Nano-Magnet

Autor:	Salman, Z., Kiefl, R. F., Chow, K. H., MacFarlane, W. A., Keeler, T., Parolin, T., Tabbara, S., Wang, D.
Rok vydání:	2008
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science Condensed Matter - Strongly Correlated Electrons
Zdroj:	Phys. Rev. B 77, 214415 (2008)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.77.214415
Popis:	We present muon spin lattice relaxation measurements in the V15 spin 1/2 molecular nano-magnet. We find that the relaxation rate in low magnetic fields (<5 kG) is temperature independent below ~10 K, implying that the molecular spin is dynamically fluctuating down to 12 mK. These measurements show that the fluctuation time increases as the temperature is decreased and saturates at a value of ~6 nsec at low temperatures. The fluctuations are attributed to V15 molecular spin dynamics perpendicular to the applied magnetic field direction, induced by coupling between the molecular spin and nuclear spin bath in the system. Comment: Accepted for publication in Phys. Rev. B, 5 pages, 5 figure
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0805.2164 Zobrazit plný text záznamu View this record from Arxiv