Local magnetic and structural properties of the low-temperature orthorhombic to low-temperature tetragonal transition: A {sup 139}La NQR study in lightly hole-doped La{sub 1.8{minus}x}Eu{sub 0.2}Sr{sub x}CuO{sub 4}
- Condensed Matter and Thermal Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- II. Physikalisches Institut, Universitaet zu Koeln, D-50937 Koeln (Germany)
{sup 139}La nuclear quadrupole resistance (NQR) and relaxation measurements in lightly hole-doped La{sub 1.8{minus}x}Eu{sub 0.2}Sr{sub x}CuO{sub 4} have been used to investigate the microscopic properties of the low-temperature orthorhombic to low-temperature tetragonal transition. The transition is characterized by a sharp peak in {sup 139}La NQR relaxation rate, indicating phonon softening. We find that the structural phase transition is accompanied by a modification of the spin state. The data for the spin freezing and the recovery of sublattice magnetization at low T are presented and discussed in relation to the studies of La{sub 2{minus}x}Sr{sub x}CuO{sub 4} and La{sub 2}Cu{sub 1{minus}x}Li{sub x}O{sub 4}. {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 304263
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 6 Vol. 59; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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