Local magnetic and structural properties of the low-temperature orthorhombic to low-temperature tetragonal transition: A La-139 NQR study in lightly hole-doped La1.8-xEu0.2SrxCuO4

Authors
Suh, BJ Hammel, PC Hucker, M Buchner, B
Citation
Bj. Suh et al., Local magnetic and structural properties of the low-temperature orthorhombic to low-temperature tetragonal transition: A La-139 NQR study in lightly hole-doped La1.8-xEu0.2SrxCuO4, PHYS REV B, 59(6), 1999, pp. R3952-R3955
Citations number
25
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
59
Issue
6
Year of publication
1999
Pages
R3952 - R3955
Database
ISI
SICI code
0163-1829(19990201)59:6<R3952:LMASPO>2.0.ZU;2-M
Abstract
La-139 nuclear quadrupole resistance (NQR) and relaxation measurements in l ightly hole-doped La1.8-xEu0.2SrxCuO4 have been used to investigate the mic roscopic properties of the low-temperature orthorhombic to low-temperature tetragonal transition. The transition is characterized by a sharp peak in L a-139 NQR relaxation rate, indicating phonon softening. We find that the st ructural phase transition is accompanied by a modification of the spin stat e. The data for the spin freezing and the recovery of sublattice magnetizat ion at low T an presented and discussed in relation to the studies of La2-x SrxCuO4 and La2Cul-xLixO4.