Studies of 139La and 63/65Cu-NQR in La 2-xMxCuO4 (M = Ba, Sr)
Open Access
- 1 April 1990
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung A
- Vol. 45 (3-4) , 433-438
- https://doi.org/10.1515/zna-1990-3-438
Abstract
The nuclear quadrupole resonance of 139La and 63/65Cu in La2-x CMxCuO4 (M = Ba, Sr) is investigated for x up to unity. The shift of the resonance frequency of 139La-NQR for 0.01 < x c, where the frustrated magnetic phase appears. The Cu-NQR reveals clear changes of T1 -1 and T2 -1 and also of the profile of the Cu-NQR spectra with increasing x beyond x = 0.3~0.4, suggesting a suppression of antiferromagnetic fluctuations by hole-doping, and also a change of the electronic state of the La-system around x = 0.3 ~0.4.Keywords
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