{sup 139}La-NMR study of spin-flop and spin structure in La{sub 2{minus}x}Sr{sub x}CuO{sub 4} (x{approximately}1/8)

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

DOI:https://doi.org/10.1023/A:1022558809087· OSTI ID:20012836

Chiba, Kaichiro; Goto, Takayuki; Mori, Masakatsu; Suzuki, Takao; Seki, Katsutoshi; Fukase, Tetsuo

The external field dependence of the hyperfine field at La-site has been studied on La{sub 2{minus}x}Sr{sub x}CuO{sub 4}(x = 0.115) and La{sub 2{minus}x}Ba{sub x}CuO{sub 4}(x = 0.125), where the magnetic ordering in Cu-3d spins exists at low temperature. In La{sub 1.885}Sr{sub 0.115}CuO{sub 4}, a significant decrease in the resonance line width was observed above a field of H{sub c} {approx} 7.5T, which is the direct evidence of the spin-flop in the canted-spin system with Dzyaloshinski-Moriya interaction. The spin-flop field H{sub c} of 7.5T is slightly lower than that in La{sub 2}CuO{sub 4}(H{sub c}{approx}10T), reflecting the decrease of the tilting angle of the CuO{sub 6} octahedra by the substitution of Sr{sup 2+} ion for La-site.

• Research Organization: Tohoku Univ., Sendai (JP)
• OSTI ID: 20012836
• Journal Information: Journal of Low Temperature Physics, Vol. 117, Issue 3-4; Conference: International Conference on Physics and Chemistry of Molecular and Oxide Superconductors, MOS'99, Stockholm (SE), 07/28/1999--08/02/1999; Other Information: PBD: Nov 1999; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
LANTHANUM 139
NUCLEAR MAGNETIC RESONANCE
LANTHANUM OXIDES
STRONTIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
CRITICAL FIELD
CRYSTAL STRUCTURE
SPIN