NMR study of high-TC superconductors

K. Asayama, Y. Kitaoka, Guo-Qing Zheng, K. Ishida, K. Magishi

Research output: Contribution to journalArticle

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Abstract

Recent NMR study of high-TC superconductors carried out by Osaka group is reviewed. NQR frequency vQ, Knight shift K, T1 of 63Cu and 17O were measured over a wide hole doping range from light-to heavy-doped systems, LSCO, YBCO, HBCCO, BSCCO, TBCCO and TBCO, together with impurity and pressure effect. By analysing vQ, K and T1, the local hole numbers of Cu and O at the CuO2 plane, n(Cu) and n(O) the relative magnitude of the uniform susceptibility, χ0 and the low-frequency component of the antiferromagnetic spin fluctuations (AFSF), χQ/Γ (χQ is the staggered susceptibility and Γ is the characteristic energy of the spin fluctuation at q = 0) are obtained. The relation between n(Cu), n(O) and χQ, χQ/Γ, TC, etc. were discussed. There are optimum values of n(Cu)/2n(O) and n(Cu) + 2n(O) to give maximum TC. The NMR results in the superconducting state are well-explained by d-wave pairing model. The result is consistent with the AFSF mediated superconducting model.

Original languageEnglish
Pages (from-to)478-483
Number of pages6
JournalPhysica B: Condensed Matter
Volume223-224
Issue number1-4
DOIs
Publication statusPublished - Jun 2 1996
Externally publishedYes

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Spin fluctuations
Superconducting materials
Nuclear magnetic resonance
nuclear magnetic resonance
magnetic permeability
Pressure effects
pressure effects
Doping (additives)
Impurities
low frequencies
impurities
energy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Asayama, K., Kitaoka, Y., Zheng, G-Q., Ishida, K., & Magishi, K. (1996). NMR study of high-TC superconductors. Physica B: Condensed Matter, 223-224(1-4), 478-483. https://doi.org/10.1016/0921-4526(96)00153-6

NMR study of high-TC superconductors. / Asayama, K.; Kitaoka, Y.; Zheng, Guo-Qing; Ishida, K.; Magishi, K.

In: Physica B: Condensed Matter, Vol. 223-224, No. 1-4, 02.06.1996, p. 478-483.

Research output: Contribution to journalArticle

Asayama, K, Kitaoka, Y, Zheng, G-Q, Ishida, K & Magishi, K 1996, 'NMR study of high-TC superconductors', Physica B: Condensed Matter, vol. 223-224, no. 1-4, pp. 478-483. https://doi.org/10.1016/0921-4526(96)00153-6
Asayama K, Kitaoka Y, Zheng G-Q, Ishida K, Magishi K. NMR study of high-TC superconductors. Physica B: Condensed Matter. 1996 Jun 2;223-224(1-4):478-483. https://doi.org/10.1016/0921-4526(96)00153-6
Asayama, K. ; Kitaoka, Y. ; Zheng, Guo-Qing ; Ishida, K. ; Magishi, K. / NMR study of high-TC superconductors. In: Physica B: Condensed Matter. 1996 ; Vol. 223-224, No. 1-4. pp. 478-483.
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