NQR Study of Spin-Freezing in Superconducting La2-xSrxCuO4: The Example of x=0.06

M. -H. Julien, P. Carretta, F. Borsa

NQR 139La and 63Cu spin-lattice relaxation rate (1/T_1) measurements in a La1.94Sr0.06CuO4 single crystal are described. Slowing-down of Cu2+ spin fluctuations is evidenced through…