NMR-NQR study of the crossover from the spin-glass to the superconducting phase in La{sub 2{minus}x}Sr{sub x}CuO{sub 4}

Journal Article · Tue Apr 20 00:00:00 EDT 1999 · International Journal of Modern Physics B

DOI:https://doi.org/10.1142/S0217979299001235· OSTI ID:687441

Julien, M H; Carretta, P; Borsa, F; Rigamonti, A ^[1]

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1. Unita INFM di Pavia (Italy). Dipt. di Fisica

{sup 139}La and {sup 63}Cu NQR relaxation rates are used to obtain insights on the effects of itinerant holes on the magnetic in-plane correlation length, for x {le} 0.04 in La{sub 2{minus}x}Sr{sub x}CuO{sub 4}. For these concentrations, corresponding to spin-glass behavior at low temperature, evidence for the microsegregation of holes along stripes is presented. Preliminary relaxation results for an amount of Sr doping leading to superconductivity are also presented and discussed in terms of the crossover from the spin-glass to the underdoped superconducting regime: for x = 0.06 a slowing down of spin fluctuations is evidenced and superconductivity is found to coexist with spin-freezing.

• OSTI ID: 687441
• Report Number(s): CONF-9810174-; ISSN 0217-9792; TRN: 99:010394
• Journal Information: International Journal of Modern Physics B, Vol. 13, Issue 9-10; Conference: 9. national congress on high temperature superconductivity (SATT9), Ravenna (Italy), 6-9 Oct 1998; Other Information: PBD: 20 Apr 1999
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
LANTHANUM 139
COPPER 63
NUCLEAR MAGNETIC RESONANCE
HOLES
LANTHANUM OXIDES
STRONTIUM OXIDES
COPPER OXIDES
SPIN GLASS STATE
SUPERCONDUCTIVITY
CRYSTAL DOPING