Confirmation of a vanishingly small ring-current magnetic susceptibility of icosahedral C sub 60
- IBM Research Div, Yorktown Heights, NY (United States)
- Univ. of California, Los Angeles (United States)
In 1987 Elser and Haddon predicted a vanishingly small {pi}-electron contribution to the magnetic susceptibility of the icosahedral C{sub 60} molecule (buckminsterfullerene). This result runs counter to intuition and was subsequently disputed on the basis of ab initio computations. Following the recent discovery of method for preparing (and purifying) large quantities of C{sub 60}, the authors here report measurements of the magnetic susceptibility, {chi}, of a solid sample of pure C{sub 60} by SQUID magnetometry. The obtained mass value, {chi}{sub g} = {minus}0.35 {times} 10{sup {minus}6}, is far below that of graphite or benzene, consistent with the Elser-Haddon picture of accidental cancellation of the diamagnetic and paramagnetic contributions to {chi}. An estimate of the unusually large paramagnetic contribution is in accord with recent measurements of C{sub 60}'s electronic excitations. The C{sub 70} molecule is also measured to have {chi}{sub g} = {minus}(0.59 {plus minus} 0.05) {times} 10{sup {minus}6}.
- OSTI ID:
- 6018008
- Journal Information:
- Journal of Physical Chemistry; (United States), Vol. 95:9; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON COMPOUNDS
MAGNETIC SUSCEPTIBILITY
AROMATICS
ELECTRONIC STRUCTURE
EXPERIMENTAL DATA
RING CURRENTS
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
CURRENTS
DATA
ELECTRIC CURRENTS
INFORMATION
MAGNETIC PROPERTIES
NUMERICAL DATA
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
TEMPERATURE RANGE
360606* - Other Materials- Physical Properties- (1992-)