17O NMR study of YBa2Cu3O7-δ (Tc=92 K)

M. Horvatić; Y. Berthier; P. Butaud; Y. Kitaoka; P. Ségransan; C. Berthier; H. Katayama-Yoshida; Y. Okabe; T. Takahashi

doi:10.1016/0921-4534(89)91305-1

¹⁷O NMR study of YBa₂Cu₃O_7-δ (T_c=92 K)

M. Horvatić, Y. Berthier, P. Butaud, Y. Kitaoka, P. Ségransan, C. Berthier, H. Katayama-Yoshida, Y. Okabe, T. Takahashi

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article › peer-review

51 Citations (Scopus)

Abstract

We have performed ¹⁷O NMR in YBa₂Cu₃O₇ oriented powder samples in the temperature range 10-360 K for the orientation H₀∥c and H₀⊥c. The Electric Field Gradient (EFG) and Magnetic Hyperfine Shift (MHS) tensors have been determined for the four oxygen sites in the structure. The isotropic (axial) part of the MHS tensor were found to be equal to 0.21 (0.08)% for the O(2,3) site in the CuO₂ plane and to 0.04(0.05)% for the bridging oxygen O(4). Both were found temperature independent in the normal state. Below T_c, they vanish to zero and the data for the MHS K_cc[O(2,3)] show that this decrease is faster than expected from BCS theory. The coupling between the localized spins at the Cu (2) sites and the mobile oxygen p-holes is discussed in the light of these results.

Original language	English
Pages (from-to)	689-696
Number of pages	8
Journal	Physica C: Superconductivity and its applications
Volume	159
Issue number	5
DOIs	https://doi.org/10.1016/0921-4534(89)91305-1
Publication status	Published - 1989 Jul 15

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/0921-4534(89)91305-1

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title = "17O NMR study of YBa2Cu3O7-δ (Tc=92 K)",

abstract = "We have performed 17O NMR in YBa2Cu3O7 oriented powder samples in the temperature range 10-360 K for the orientation H0∥c and H0⊥c. The Electric Field Gradient (EFG) and Magnetic Hyperfine Shift (MHS) tensors have been determined for the four oxygen sites in the structure. The isotropic (axial) part of the MHS tensor were found to be equal to 0.21 (0.08)% for the O(2,3) site in the CuO2 plane and to 0.04(0.05)% for the bridging oxygen O(4). Both were found temperature independent in the normal state. Below Tc, they vanish to zero and the data for the MHS Kcc[O(2,3)] show that this decrease is faster than expected from BCS theory. The coupling between the localized spins at the Cu (2) sites and the mobile oxygen p-holes is discussed in the light of these results.",

author = "M. Horvati{\'c} and Y. Berthier and P. Butaud and Y. Kitaoka and P. S{\'e}gransan and C. Berthier and H. Katayama-Yoshida and Y. Okabe and T. Takahashi",

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T1 - 17O NMR study of YBa2Cu3O7-δ (Tc=92 K)

AU - Horvatić, M.

AU - Berthier, Y.

AU - Butaud, P.

AU - Kitaoka, Y.

AU - Ségransan, P.

AU - Berthier, C.

AU - Katayama-Yoshida, H.

AU - Okabe, Y.

AU - Takahashi, T.

PY - 1989/7/15

Y1 - 1989/7/15

N2 - We have performed 17O NMR in YBa2Cu3O7 oriented powder samples in the temperature range 10-360 K for the orientation H0∥c and H0⊥c. The Electric Field Gradient (EFG) and Magnetic Hyperfine Shift (MHS) tensors have been determined for the four oxygen sites in the structure. The isotropic (axial) part of the MHS tensor were found to be equal to 0.21 (0.08)% for the O(2,3) site in the CuO2 plane and to 0.04(0.05)% for the bridging oxygen O(4). Both were found temperature independent in the normal state. Below Tc, they vanish to zero and the data for the MHS Kcc[O(2,3)] show that this decrease is faster than expected from BCS theory. The coupling between the localized spins at the Cu (2) sites and the mobile oxygen p-holes is discussed in the light of these results.

AB - We have performed 17O NMR in YBa2Cu3O7 oriented powder samples in the temperature range 10-360 K for the orientation H0∥c and H0⊥c. The Electric Field Gradient (EFG) and Magnetic Hyperfine Shift (MHS) tensors have been determined for the four oxygen sites in the structure. The isotropic (axial) part of the MHS tensor were found to be equal to 0.21 (0.08)% for the O(2,3) site in the CuO2 plane and to 0.04(0.05)% for the bridging oxygen O(4). Both were found temperature independent in the normal state. Below Tc, they vanish to zero and the data for the MHS Kcc[O(2,3)] show that this decrease is faster than expected from BCS theory. The coupling between the localized spins at the Cu (2) sites and the mobile oxygen p-holes is discussed in the light of these results.

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¹⁷O NMR study of YBa₂Cu₃O_7-δ (T_c=92 K)

Abstract

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