Local magnetic and structural properties of the low-temperature orthorhombic to low-temperature tetragonal transition: A
نویسنده
چکیده
La nuclear quadrupole resistance ~NQR! and relaxation measurements in lightly hole-doped La1.82xEu0.2SrxCuO4 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 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 La22xSrxCuO4 and La2Cu12xLixO4. @S0163-1829~99!50804-7#
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