17O, 63Cu and 205Tl NMR study of over-doped Tl2Ba2CuOy

✍ Scribed by S. Kambe; Y. Yoshinari; H. Yasuoka; A. Hayashi; Y. Ueda

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 133 KB
• Volume: 185-189
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(91)91814-k

✦ Synopsis

We have measured the temperature dependence of l/T1 at the O, Cu and T1 sites of T12Ba2CuOy. 1/Tx at the T1 sites does not follow the Korringa law for over-doped and superconducting specimens {4.2-300K). On the other hand, 1/Tx at the 0 and Cu sites appeared to be the Korringa type(TxxT=const) up to 200K for the over-doped specimen.

From a comparison of the magnitude of 1/Tx at the 0 and Cu sites, we concluded that the antlferromagnetic spin fluctuation are playing essential role to the spindynamics at Cu site even in the over-doped state.