Possible stripe fluctuations in 2-x-yyx at room temperature observed by NQR spectroscopyQ.-M. Zhang, X. N. Ying, M. Gu and Y. N. Wang
National Laboratory of Solid State Microstructures, Department of Physics Nanjing University - Nanjing 210093, PRC
received 3 September 2003; accepted in final form 3 March 2005
published online 30 March 2005
nuclear quadrupole resonance (NQR) studies at room temperature were reported on six -doped 2-xx samples. The NQR spectrum for has a different line shape compared with those from the other samples, which is similar to the case of the insulating . This may suggest that the stripe fluctuations at such a special and doping fall into the frequency window of NQR. The spectra of the other five samples were analysed by pairs of and Gaussians at A and B sites. The full width of half-maxim (FWHM) for at B sites is anomalously large for , which was considered to be related to the stripe fluctuations.
74.25.Nf - Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.).
74.72.Dn - La-based cuprates.
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