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https://doi.org/10.1143/jpsj.69.1023
Copy DOIPublication Date: Apr 15, 2000 | |
Citations: 13 |
Cu-NQR spectra were measured in the wide temperature range of 300 K to 1.5 K to examine the possibility of the occurrence of the static spin-charge stripe order in La 2- x Ba x CuO 4 with x =1/8. The usual NQR spectrum is observed above T d2 , the structural transition temperature from the LTO to LTT phase. Below T d2 , the signal intensity decreases rapidly with decreasing temperature, which is accompanied with the abrupt increase of the effective spin echo decay rate, while no significant changes appear in its lineshape down to 10 K. Below 10 K, the spectrum starts to spread and exhibits unusual broadening with a tail to about 80 MHz at 1.5 K. The abnormally broad spectrum at 1.5 K, which is regarded as evidence of the static spin and/or charge order, is simulated satisfactorily in terms of the stripe order proposed for La 2- x - y Nd y Sr x CuO 4 ( x =1/8) with the assumption of the modulation amplitude for Cu moment of about 0.24 µ B .
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