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Zn-doping dependence of the wipeout region around Zn in YBa2(Cu1-xZnx)4O8

Y. Itoh·T. Machi·N. Watanabe·S. Adachi·C. Kasai·N. Koshizuka
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Abstract

We estimated the spread of the magnetically enhanced regions (wipeout regions) around Zn ions in high-Tc superconductors YBa2(Cu1-xZnx)4O8 (x=0, 0.005, 0.01, and 0.022) at T=4.2 K, via the planar 63Cu nuclear spin-lattice relaxation study with Cu nuclear quadrupole resonance (NQR) spin-echo technique. From the analysis of nonexponential planar Cu nuclear spin-lattice relaxation curves, we found that the wipeout region per a Zn ion shrinks with Zn doping in the superconducting state. The shrinkage is associated with suppression of the host antiferromagnetic spin correlation, as a result from a dilution effect on the magnetic CuO2 network.

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Y. Itoh, T. Machi, N. Watanabe, S. Adachi, C. Kasai, N. Koshizuka. 2001-10-26. Zn-doping dependence of the wipeout region around Zn in YBa2(Cu1-xZnx)4O8. https://doi.org/10.1016/s0921-4534(02)01412-0

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