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R. F. Kiefl J. Sonier D. A. Bonn J. H. Brewer J. F. Carolan K. H. Chow P. Dosanjh W. N. Hardy Ruixing Liang W. A. MacFarlane P. Mendels G. D. Morris T. M. Riseman J. W. Schneider 《Hyperfine Interactions》1994,86(1):537-542
We report precision transverse fieldSR measurements of the internal field distribution in the vortex state of crystalline YBa2Cu3O6.95. A novel low background apparatus was used to study a mosaic sample of three high quality single crystals (Tc=93.3K). The observed frequency spectra in magnetic fields of 5kG and 15 kG applied along the c-axis have the characteristic features expected for a regular vortex lattice with some additional broadening. From a preliminary analysis we find that [(0)/(T)]2 has a linear temperature coefficient forT<30 K. Such a term is inconsistent with simple s-wave pairing in the superconducting state. These results support recent microwave measurements of(T) on similar crystals in zero applied field but differ significantly from previousSR reports on sintered powders and crystals with lower Tc.This research was supported by the Natural Sciences and Engineering Research Council of Canada. 相似文献
45.
We present theS
1 Raman spectra of 1,4-DiPhenyl-1,3-Butadiene (DPB) in a series of linear alkanes (pentane, hexane, heptane, octane, decane, and dodecane). Bands assignable to both the 11
B
u
and 21
A
g
states are present, suggesting that the state we are observing in solution is a mixed state with both 11
B
u
and 21
A
g
character. The relative intensities of several bands associated with CoCo stretching motions in the 21
A
g
and 11
B
u
states change systematically through the solvent series. The relative intensity changes reflect a changing distribution ofs-trans conformers inS
1 DPB as the solvent is varied. We suggest that the distribution ofs-trans conformers inS
1 DPB controls the nature of the mixing between the 21
A
g
and 11
B
u
states and that the distribution of conformers is controlled by the solvent viscosity. Changes in the peak position and bandwidth of the phenyl C=C stretch with delay reflect vibrational relaxation processes inS
1 DPB. We observe anomolous behavior in pentane that we attribute to the effect of the solvent structure on the ability of DPB to exchange energy with pentane. 相似文献
46.
Espy MA Dehnhard D Edwards CM Palarczyk M Langenbrunner JL Davis B Burleson GR Blanchard S Gibbs WR Lail B Nelson B Park BK Zhao Q Cummings WJ Delheij PP Jennings BK Henderson R Häusser O Thiessen D Brash E Jones MK Larson B Brinkmöller B Maeda K Morris CL O'Donnell JM Penttilä S Swenson D Tupa D Bennhold C Kamalov SS 《Physical review letters》1996,76(20):3667-3670
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Allen WH Bond IA Budding E Conway MJ Daniel A Fenton KB Fujii H Fujii Z Hayashida N Hibino K Honda M Humble JE Kabe S Kasahara K Kifune T Lythe GD Masaike A Matsubara Y Mitsui K Miura Y Mori M Muraki Y Nagano M Nakamura T Nishizawa M Morris PM Ogio S Saito T Sakata M Sato H Shimizu HM Spencer M Storey JR Tanimori T Teshima M Torii S Wadsworth A Watase Y Woodhams MD Yamamoto Y Yock PC Yuda T 《Physical review D: Particles and fields》1993,48(2):466-478
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