TY - JOUR
T1 - Orbital and spin susceptibilities of the plane copper sites in YBa 2Cu3Ox system
AU - Shimizu, Tadashi
AU - Aoki, Haruyoshi
AU - Yasuoka, Hiroshi
AU - Tsuda, Toshinobu
AU - Ueda, Yutaka
AU - Yoshimura, Kazuyoshi
AU - Kosuge, Koji
PY - 1993/10
Y1 - 1993/10
N2 - 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.
AB - 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.
KW - High temperature superconducting copper oxides
KW - K-χ plot
KW - Magnetic susceptibility
KW - NMR
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M3 - Article
AN - SCOPUS:33751271529
VL - 62
SP - 3710
EP - 3720
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 10
ER -