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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 10, Number 6
BKCSDE 10(6)
June 20, 1989

Title	Electric Field Gradients at Copper Sites in the High Tc Superconductor YBa2Cu3O7-x
Author	Hyunsoo So
Keywords
Abstract	Quadrupole coupling constants of 63CU in the high Tc superconductor YBa2Cu3O7-x, as determined by NQR or NMR studies, are compared with the values for representative Cu(Ⅱ) complexes determined by analyzing the forbidden lines in their EPR spectra. It is shown that the two NQR lines at 22 and 31 MHz correpsond to the quadrupole coupling constants of a square planar Cu(Ⅱ) complex and a square pyramidal Cu(Ⅱ) complex, respectively.t This result is in agreement with the assignment of these lines to Cu(1) and Cu(2) sites in YBCO based on the NMR spectra of oriented single crystals.
Page	551 - 554
Full Text	PDF

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