89Y NMR Study of Antiferromagnetic YBa2Cu3O6
- 15 April 1990
- journal article
- letter
- Published by Physical Society of Japan in Journal of the Physics Society Japan
- Vol. 59 (4), 1139-1142
- https://doi.org/10.1143/jpsj.59.1139
Abstract
The 89 Y NMR linewidth Δ H and nuclear spin-lattice relaxation rate 1/ T 1 have been measured in YBa 2 Cu 3 O 6 in the temperature range from room temperature to 470 K with the external magnetic field parallel and perpendicular to the c -axis. Both Δ H and 1/ T 1 show critical behavior due to the three-dimensional (3D) antiferromagnetic phase transition at the Néel temperature T N =412 K. Above 425 K, the relaxation rate is already dominated by the 2D fluctuations of the antiferromagnetic square lattice of Cu 2+ .Keywords
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