BA NUCLEAR-QUADRUPOLE RESONANCE STUDY OF YBA2CU4O8

Authors
LOMBARDI A MALI M ROOS J BRINKMANN D YAKUBOWSKII A
Citation
A. Lombardi et al., BA NUCLEAR-QUADRUPOLE RESONANCE STUDY OF YBA2CU4O8, Physica. C, Superconductivity, 235, 1994, pp. 1651-1652
Citations number
10
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
235
Year of publication
1994
Part
3
Pages
1651 - 1652
Database
ISI
SICI code
0921-4534(1994)235:<1651:BNRSOY>2.0.ZU;2-L
Abstract
We have measured the temperature dependence of the nuclear quadrupole resonance (NQR) frequency, nu(Q), and the spin-lattice relaxation time of Ba-135 and Ba-137 in the superconductor YBa2Cu4O8 (T-c = 81 K). Th e temperature dependence of nu(Q)(T) is given by nu(Q)(T) = nu(Q)(0)(1 - AT(alpha)). The relaxation is of quadrupolar origin and can be desc ribed perfectly by a two-phonon Raman process with a Debye temperature of 185 K.