Abstract
Magnetic properties of solvent-free crystals of the endohedral Sc@C 82 are investigated by SQUID and X-ray powder diffraction. We find that the crystal is a paramagnet and the magnetic susceptibility decreases from 150 K with evidence of antiferromagnetic-like interactions by slow cooling. X-ray crystal analysis reveals the presence of a phase transition at 150 K, which is attributed to an orientational ordering transition of the fullerene molecules. At low temperatures we find a magnetic metastable state that can be controlled by the cooling rate. The metastable state can be formed by rapid cooling. The direction of Sc@C82 molecular axis in the crystals is disordered in the metastable state, and the susceptibility is higher than that in the slow cooling case at low temperature.
Original language | English |
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Pages (from-to) | 1019-1024 |
Number of pages | 6 |
Journal | ChemPhysChem |
Volume | 8 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2007 May 14 |
Externally published | Yes |
Keywords
- Magnetic properties
- Metallofullerenes
- Phase
- Scandium
- Transitions
- X-ray diffraction
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry