Temperature dependence of the Cu(2) NQR line width in YBa2Cu3O7−y

Abstract
Systematic measurements of the 63Cu(2) NQR line width were performed in underdoped YBa2Cu3O7−y samples over the temperature range 4.2 K<TT<Tc. Quantitative estimates of the line broadening at T<Tc agree with the measurement results.
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