1. Magnetic properties of hexanuclear manganese antiferromagnetic clusters {Mn6}
- Author
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K. H. Han, D. Moon, K. Lee, M. S. Lah, B. J. Kim, B. J. Suh, and M. Belesi
- Subjects
Coupling constant ,Laser linewidth ,Condensed matter physics ,Chemistry ,Atomic force microscopy ,Relaxation rate ,Proton NMR ,General Physics and Astronomy ,chemistry.chemical_element ,Antiferromagnetism ,Condensed Matter::Strongly Correlated Electrons ,Manganese ,Spin (physics) - Abstract
We report a study of magnetic properties of a series of hexanuclear manganese metallamacrocycles {Mn6}. The magnetic properties are characterized by antiferromagnetic (AFM) coupling constants J1∕kB≈−4.0K, between the nearest neighbors, and J2∕kB≈−1.2K, between the next-nearest neighbors. The temperature dependence of H1 NMR linewidth is observed to be consistent with the AFM singlet ground state with a total spin ST=0. H1 nuclear spin-lattice relaxation rate 1∕T1 shows a strong enhancement at low temperatures with a peak around T≈J1, as commonly observed in AFM molecular rings and clusters.
- Published
- 2006
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