Staggered Spin Susceptibility in YBa_2Cu_3O_<6.98> and YBa_2Cu_4O_8 Observed by Cu Nuclear Spin-Spin Relaxation
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The temperature(T) dependence of the static staggered spin susceptibility X(Q) for the high T_C Cu oxides, YBa_2Cu_3O_<6.98> and YBa_2Cu_4O_8, extracted from the Cu nuclear spin-spin relaxation measurements is discussed. The self-consistent-renormalization (SCR) calculation for a two dimensional antiferromagnetic Fermi liquid well reporoduces the experimental Curie-Weiss-type T-dependence of X(Q), but the random-phase-approximation does not. This shows that the Curie-Weiss-type X(Q) of the high T_CCu oxides results from the SCR spin fluctuations at finite temperatures but not from the strong nesting of the Fermi surface.
- 社団法人日本物理学会の論文
- 1994-09-15
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