Published September 1996
| Version v1
Journal article
Determination of 13C NMR isotropic Knight shift and deviation from BCS relation in A3C60 superconductors
Creators
- 1. Department of Physics, Tokyo Metropolitan University, Minami-osawa, Hachi-oji, Tokyo 192-03 (Japan)
- 2. Department of Chemistry, Tokyo Metropolitan University, Minami-osawa, Hachi-oji, Tokyo 192-03 (Japan)
- 3. NEC Corporation, 34 miyukigaoka, Tsukuba 305 (Japan)
- 4. Japan Advanced Institute of Science and Technology, Tatsunokuchi, Ishikawa 923-12 (Japan)
Description
We determined the isotropic 13C NMR hyperfine coupling constant as aiso/2π=0.69±0.06 MHz for the C603- ion near room temperature (RT). On this basis, the spin susceptibility at RT, χs(RT), was estimated in various alkali-metal doped C60 compounds A3C60, which is approximately proportional to the lattice constant a0; we found dχs/da0=(0.61±0.06)x10-3 (emu/moleC60)/A . The correlation between the superconducting transition temperature Tc and χs(RT) was determined. It was found that Tc of Na2RbC60, Na2KC60, Li2CsC60, and ammoniated A3C60 is significantly lower than that expected from the BCS relation based on χs(RT). copyright 1996 The American Physical Society
Additional details
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter
- Journal Volume
- 54
- Journal Issue
- 10
- Journal Page Range
- p. R6861-R6864.
- ISSN
- 0163-1829
- CODEN
- PRBMDO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 28007384
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- AMBIENT TEMPERATURE; CESIUM COMPOUNDS; ELECTRONIC STRUCTURE; FULLERENES; KNIGHT SHIFT; LATTICE PARAMETERS; MAGNETIC SUSCEPTIBILITY; NMR SPECTRA; POTASSIUM COMPOUNDS; RUBIDIUM COMPOUNDS; SODIUM COMPOUNDS; SUPERCONDUCTORS; TRANSITION TEMPERATURE
- Descriptors DEC
- ALKALI METAL COMPOUNDS; CARBON; ELEMENTS; MAGNETIC PROPERTIES; NONMETALS; PHYSICAL PROPERTIES; SPECTRA; THERMODYNAMIC PROPERTIES