17O and 63Cu NMR investigations of high-Tc superconductor La18.5Sr0.15CuO4 with T c =38 K

Kenji Ishida, Yoshio Kitaoka, Guo-Qing Zheng, Kunisuke Asayama

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Abstract

17O and 63Cu NMR measurements have been made in La18.5Sr0.15CuO4 with Tc =38 K. Both 17O Knight shift and quadrupole tensor were determined from the analyses of the 17O spectrum of oriented powder. The quadrupole frequencies of the planar oxygen and Cu nuclei are consistently interpreted by the analyses of Hanzawa et al. made in YBa2Cu3,O 7 with the electric field gradients due to the on-site holes at Cu and 0 sites. Then the weight factor of the Cu-3d(x2-y2) and 2p wave functions are deduced, the latter having the larger weight. From the Knight shifts vs the bulk susceptibility plots, the hyperfine coupling constants for 170 and 63Cu were almost the same as those in YBa 2Cu3,O7. Both shifts decrease significantly below J having residual parts of 63Kab=0.38% and 17Kc =0.02% at 4.2 K, which were larger than those in YBa2Cu3,O7.

Original languageEnglish
Pages (from-to)3516-3524
Number of pages9
JournalJournal of the Physical Society of Japan
Volume60
Issue number10
Publication statusPublished - Oct 1991
Externally publishedYes

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nuclear magnetic resonance
quadrupoles
weight (mass)
plots
wave functions
tensors
magnetic permeability
gradients
nuclei
electric fields
shift
oxygen

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

17O and 63Cu NMR investigations of high-Tc superconductor La18.5Sr0.15CuO4 with T c =38 K. / Ishida, Kenji; Kitaoka, Yoshio; Zheng, Guo-Qing; Asayama, Kunisuke.

In: Journal of the Physical Society of Japan, Vol. 60, No. 10, 10.1991, p. 3516-3524.

Research output: Contribution to journalArticle

Ishida, Kenji ; Kitaoka, Yoshio ; Zheng, Guo-Qing ; Asayama, Kunisuke. / 17O and 63Cu NMR investigations of high-Tc superconductor La18.5Sr0.15CuO4 with T c =38 K. In: Journal of the Physical Society of Japan. 1991 ; Vol. 60, No. 10. pp. 3516-3524.
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abstract = "17O and 63Cu NMR measurements have been made in La18.5Sr0.15CuO4 with Tc =38 K. Both 17O Knight shift and quadrupole tensor were determined from the analyses of the 17O spectrum of oriented powder. The quadrupole frequencies of the planar oxygen and Cu nuclei are consistently interpreted by the analyses of Hanzawa et al. made in YBa2Cu3,O 7 with the electric field gradients due to the on-site holes at Cu and 0 sites. Then the weight factor of the Cu-3d(x2-y2) and 2p wave functions are deduced, the latter having the larger weight. From the Knight shifts vs the bulk susceptibility plots, the hyperfine coupling constants for 170 and 63Cu were almost the same as those in YBa 2Cu3,O7. Both shifts decrease significantly below J having residual parts of 63Kab=0.38{\%} and 17Kc =0.02{\%} at 4.2 K, which were larger than those in YBa2Cu3,O7.",
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N2 - 17O and 63Cu NMR measurements have been made in La18.5Sr0.15CuO4 with Tc =38 K. Both 17O Knight shift and quadrupole tensor were determined from the analyses of the 17O spectrum of oriented powder. The quadrupole frequencies of the planar oxygen and Cu nuclei are consistently interpreted by the analyses of Hanzawa et al. made in YBa2Cu3,O 7 with the electric field gradients due to the on-site holes at Cu and 0 sites. Then the weight factor of the Cu-3d(x2-y2) and 2p wave functions are deduced, the latter having the larger weight. From the Knight shifts vs the bulk susceptibility plots, the hyperfine coupling constants for 170 and 63Cu were almost the same as those in YBa 2Cu3,O7. Both shifts decrease significantly below J having residual parts of 63Kab=0.38% and 17Kc =0.02% at 4.2 K, which were larger than those in YBa2Cu3,O7.

AB - 17O and 63Cu NMR measurements have been made in La18.5Sr0.15CuO4 with Tc =38 K. Both 17O Knight shift and quadrupole tensor were determined from the analyses of the 17O spectrum of oriented powder. The quadrupole frequencies of the planar oxygen and Cu nuclei are consistently interpreted by the analyses of Hanzawa et al. made in YBa2Cu3,O 7 with the electric field gradients due to the on-site holes at Cu and 0 sites. Then the weight factor of the Cu-3d(x2-y2) and 2p wave functions are deduced, the latter having the larger weight. From the Knight shifts vs the bulk susceptibility plots, the hyperfine coupling constants for 170 and 63Cu were almost the same as those in YBa 2Cu3,O7. Both shifts decrease significantly below J having residual parts of 63Kab=0.38% and 17Kc =0.02% at 4.2 K, which were larger than those in YBa2Cu3,O7.

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