Cu nuclear spin-spin relaxation in YBa2Cu3O6.98 and YBa2Cu4O8 |
| |
Authors: | Yutaka Itoh Hiroshi Yasuoka Yoko Fujiwara Yutaka Ueda |
| |
Institution: | (1) Institute for Solid State Physics, University of Tokyo, Roppongi Minato-ku, 106 Tokyo, Japan |
| |
Abstract: | We have measured the temperature (T) dependence of the transverse relaxation rate (T
G
–1
) of the Cu(1) nuclear spin in YBa2Cu3O6.98 (T
c=92 K) and YBa2Cu4O8 (T
c=82 K). From the scaling ratio ofT
G
–2
(Cu1) toT
G
–2
(Cu2), we have estimated the strength of a covalent bonding between the CuO2 plane and the CuO chain to be B 0.38×A
zz. The experimentalT
G
–1
(Cu1) in YBa2Cu4O8 was of the same order of magnitude as the estimated one fromT
G
–1
(Cu2). These results appear to indicate that the electrons in the CuO2 plane fairly spread out of the plane in both compounds. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |