In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 34, No. 9R ( 1995-09-01), p. 4774-
Abstract:
We report an alternative method for preparing K 3 C 60 fullerene superconductors. Potassium hydride (KH) is used to dope potassium into C 60 powder. AC susceptibility and DC field-cooling susceptibility measurements show reasonably large diamagnetic signals in the prepared sample. Magnetic relaxation was measured on the sample and compared to that of a second K 3 C 60 sample prepared by doping with pure potassium. The apparent pinning potential, U 0 , of the first K 3 C 60 is found to be about 10 meV at 5 K and shows little temperature dependence up to 13 K; in contrast, U 0 of the second sample increases with temperature. The relaxation rate vs temperature curve of the first sample shows a peak at 9 K. U 0 of the KH-prepared sample is smaller than that of the second sample for most temperatures. We attribute this to a more homogeneous distribution of the potassium atoms in the KH-prepared sample than that of the second sample.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.34.4774
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1995
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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