F.J. Himpsel, T.A. Jung, et al.
Surface Review and Letters
Nuclear spin-lattice relaxation of 139La in (I) La1.8Sr0.2CuO4-δ and La2CuO4 was investigated. Below the superconducting transition temperature Tc = 38 K the relaxation rate in (I) follows an Arrhenius law with an activation energy Δ = 11.5 meV, leading to a gap energy of 2Δ/kTc = 7. The relaxation time of 139La in (II), however, shows a completely different temperature dependence, which can be explained by antiferromagnetic fluctuations. © 1988 Elsevier Science Publishers B.V.
F.J. Himpsel, T.A. Jung, et al.
Surface Review and Letters
Shiyi Chen, Daniel Martínez, et al.
Physics of Fluids
A. Ney, R. Rajaram, et al.
Journal of Magnetism and Magnetic Materials
J.V. Harzer, B. Hillebrands, et al.
Journal of Magnetism and Magnetic Materials