ESR studies of doped La{sub 2}CuO{sub 4}

Journal Article · Mon Nov 01 04:00:00 EST 1999 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1023/A:1022525801819· OSTI ID:20012820

Kataev, V; Validov, A; Buechner, B; Huecker, M; Berg, H

ESR of Gd spin probes in La{sub 2{minus}x{minus}y}Eu{sub y}Sr{sub x}CuO{sub 4} has been employed to study the Cu spin dynamics and its relation to stripe order of spins and charges in the low temperature tetragonal phase of this compound. In the magnetically ordered hole doped samples (0 {lt} x {le} 0.02) a strong enhancement of magnetic fluctuations on the ESR frequency scale is observed in this structural phase. At larger hold dopings (0.08 {le} x {approx{underscore}lt} 0.17) a drastic decrease of the Cu spin fluctuation frequency, competing with bulk superconductivity, is apparent. For the elevated hole concentrations the obtained results are consistent with the stripe model, whereas in the low hole doping regime the data give no evidence for the stripe phase formation.

• Research Organization: Univ. zu Koeln (DE)
• OSTI ID: 20012820
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 117; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER OXIDES
CRYSTAL-PHASE TRANSFORMATIONS
EUROPIUM OXIDES
HOLES
LANTHANUM OXIDES
MAGNETIC PROPERTIES
ORDER PARAMETERS
SPIN
STRONTIUM OXIDES
SUPERCONDUCTIVITY