Orbital and spin susceptibilities of the plane copper sites in YBa 2Cu3Ox system

Tadashi Shimizu, Haruyoshi Aoki, Hiroshi Yasuoka, Toshinobu Tsuda, Yutaka Ueda, Kazuyoshi Yoshimura, Koji Kosuge

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24 Citations (Scopus)


The tensor components of the magnetic susceptibility (χ) and the Knight shift (K) at the plane Cu(2) sites have been precisely measured in YBa 2Cu3Ox with x=6.98, 6.48 and 6.0. Using the temperature dependent χ and K observed in YBa2Cu 3O6.48, we have carried out the analysis of K-χ diagram to make a separation of the observed susceptibility into orbital and spin contributions. Assuming the orbital contribution from the Cu(2) ions is independent of x for 6.0≤x≤7.0, we have obtained the x dependent spin susceptibility of the Cu(2) ions. The obtained spin susceptibility is discussed in comparison with the theoretical predictions of the Heisenberg model, the Stoner model and a band structure calculation. A complete set of the parameter values used in the crystal field model of a Cu2+ ion (the crystal field splittings, the orbital reduction factor, the spin-orbit coupling and the g-factors) has been determined from the K-χ analysis.

Original languageEnglish
Pages (from-to)3710-3720
Number of pages11
JournalJournal of the Physical Society of Japan
Issue number10
Publication statusPublished - 1993 Oct


  • High temperature superconducting copper oxides
  • K-χ plot
  • Magnetic susceptibility
  • NMR

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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