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Zn-doped La2CuO4 from 139La NQR relaxation and μSR

✍ Scribed by M. Corti; A. Rigamonti; F. Tabak; P. Carretta; F. Licci; L. Raffo

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
164 KB
Volume
235-240
Category
Article
ISSN
0921-4534

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✦ Synopsis

la9La NQR spectra, ttSR precessional frequencies and relaxation rates W driven by the Cu z+ spin fluctuations are used to study the static magnetic properties and the low energy spin-excitations upon substitution of Zn 2+ (S=0) for Cu 2+ in the AF phase o~ La2Cul-xZn~O4. In particular, from the temperature behavior of W a cooperative freezing in a spin-glass state involving Zn-induced local magnetic moments is detected.

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Nuclear quadrupole resonance (NQR) of '39La is investigated in variously oxygenated La#ZuO,\_,, The saturated internal magnetic fields at the La site are invariant against defects of the crystal, suggesting that sublattice moments of Cu spins at the ground state do not change with the amount ofoxyge