139La-NMR study of spin-flop and spin structure in La2-xSrxCuO4(x ∼ 1/8)

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

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Abstract

The external field dependence of the hyperfine field at La-site has been studied on La2-xSrxCuO4(x=0.115) and La2-xBaxCuO4(x=0.125), where the magnetic ordering in Cu-3d spins exists at low temperature. In La1.885Sr0.115CuO4, a significant decrease in the resonance line width was observed above a field of Hc ≈ 7.5T, which is the direct evidence of the spin-flop in the canted-spin system with Dzyaloshinski-Moriya interaction. The spin-flop field Hc of 7.5T is slightly lower than that in La2CuO4(Hc ≈ 10T), reflecting the decrease of the tilting angle of the CuO6 octahedra by the substitution of Sr2+ ion for La-site.

Original languageEnglish
Pages (from-to)479-483
Number of pages5
JournalJournal of Low Temperature Physics
Volume117
Issue number3-4
Publication statusPublished - 1999
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Chiba, K., Goto, T., Mori, M., Suzuki, T., Seki, K., & Fukase, T. (1999). 139La-NMR study of spin-flop and spin structure in La2-xSrxCuO4(x ∼ 1/8). Journal of Low Temperature Physics, 117(3-4), 479-483.