Zn and Ni doping effects on Tc and spin gap behavior in YBa2Cu4O8 and YBa2Cu3O6.6

Guo-Qing Zheng, T. Odaguchi, Y. Kitaoka, K. Asayama, Y. Kodama, K. Mizuhashi, S. Uchida

Research output: Contribution to journalArticle

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Abstract

The existence of local moments in both Zn- and Ni-doped YBa2Cu4O8 (Y1248) is confirmed by a Curie-law T-dependence of NMR linewidth and the Cu relaxation at low T. The reduction of Cu-NQR signal intensity in Ni-doped Y1248 suggests that, in contrast to the case of Ni-doped YBa2Cu3O7 (Y1237), the Cu spin correlation around Ni is destroyed. This effect may be responsible for the larger reduction of Tc by Ni-doping than in Y1237. For Cu sites which are away from an impurity by two lattice constants, 1/T1T continues to increase below T*, at which it has a maximum in the non-doped material. The effect in reducing T*, which is sometimes called the spin gap temperature, is much more pronounced in Zn-doped samples, suggesting that the reduction of T* is mainly due to the induction of magnetic moments in the dx2-y2 orbital, which may modify Cu spin fluctuation.

Original languageEnglish
Pages (from-to)367-370
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume263
Issue number1-4
Publication statusPublished - May 1996
Externally publishedYes

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Doping (additives)
Spin fluctuations
Magnetic moments
Linewidth
Lattice constants
induction
magnetic moments
Nuclear magnetic resonance
Impurities
moments
orbitals
impurities
nuclear magnetic resonance
Temperature
temperature
barium copper yttrium oxide

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Zheng, G-Q., Odaguchi, T., Kitaoka, Y., Asayama, K., Kodama, Y., Mizuhashi, K., & Uchida, S. (1996). Zn and Ni doping effects on Tc and spin gap behavior in YBa2Cu4O8 and YBa2Cu3O6.6. Physica C: Superconductivity and its Applications, 263(1-4), 367-370.

Zn and Ni doping effects on Tc and spin gap behavior in YBa2Cu4O8 and YBa2Cu3O6.6. / Zheng, Guo-Qing; Odaguchi, T.; Kitaoka, Y.; Asayama, K.; Kodama, Y.; Mizuhashi, K.; Uchida, S.

In: Physica C: Superconductivity and its Applications, Vol. 263, No. 1-4, 05.1996, p. 367-370.

Research output: Contribution to journalArticle

Zheng, G-Q, Odaguchi, T, Kitaoka, Y, Asayama, K, Kodama, Y, Mizuhashi, K & Uchida, S 1996, 'Zn and Ni doping effects on Tc and spin gap behavior in YBa2Cu4O8 and YBa2Cu3O6.6', Physica C: Superconductivity and its Applications, vol. 263, no. 1-4, pp. 367-370.
Zheng G-Q, Odaguchi T, Kitaoka Y, Asayama K, Kodama Y, Mizuhashi K et al. Zn and Ni doping effects on Tc and spin gap behavior in YBa2Cu4O8 and YBa2Cu3O6.6. Physica C: Superconductivity and its Applications. 1996 May;263(1-4):367-370.
Zheng, Guo-Qing ; Odaguchi, T. ; Kitaoka, Y. ; Asayama, K. ; Kodama, Y. ; Mizuhashi, K. ; Uchida, S. / Zn and Ni doping effects on Tc and spin gap behavior in YBa2Cu4O8 and YBa2Cu3O6.6. In: Physica C: Superconductivity and its Applications. 1996 ; Vol. 263, No. 1-4. pp. 367-370.
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AU - Uchida, S.

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